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142 Cards in this Set
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Dysfunctional uterine bleeding (definition, systemic causes)
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abnormal bleeding during or between menstrual periods that is caused by abnormalities in the menstrual cycle or systemic diseases, not caused by organic abnormalities.
-- Systemic causes include general bleeding disorders such as ITP, liver cirrhosis, leukemia, and hypothyroidism, etc. --- After excluding these causes, majority are related to anovulation, (factors affecting the hypothalamic pituitary axis) |
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Physiologic anovulation causes vs. Pathologic causes
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Anovulation sometimes is
physiologic, such as adolescence, perimenopause, pregnancy, and lactation. Pathologic causes of anovulation mostly include polycystic ovarian syndrome, hypothalamic dysfunction, hypothyroidism, hyperprolactinemia, pituitary disorders, premature ovarian failure, and iatrogeneic reasons like medication. |
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Abnormal uterine bleeding
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Abnormal uterine bleeding (AUB) - the occurrence
of bleeding at times other than expected menses. majority of cases just after menarche or in the perimenopausal period. It can be caused by a wide variety of local and systemic disease or related to drugs. - pregnancy - structural uterine pathology (eg, fibroids, polyps, adenomyosis), - anovulation, - a disorder of hemostasis - neoplasia. Trauma and infection are less common. b. Organic abnormalities - chronic endometritis, leiomyoma, endometrial polyp, endometrial neoplasms. |
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Leiomyoma
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not restricted to uterus, but in uterus behaves as estrogen target tissue
Incidence: The most common tumor in women; occur in 25% women during reproductive years; multiple lesions common. Cause: Localized, heightened sensitivity to normal levels of estrogen. Effect: Asymptomatic, mass, abnormal bleeding (if submucosal), impaired fertility, dystocia (difficult labor), and rarely sarcoma. Morphology: Characteristic gross appearance (whorled, gray-white, sharp circumscription). Location intramural > subserous > submucous. Microscopic: mature smooth muscle with rare mitoses. Treatment: None unless symptomatic; myomectomy, hysterectomy. Clinical course: Develop and grow in reproductive years; degenerate and shrink after menopause if estrogen level is low. |
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Endometriosis (definition, sites of involvement, epi, clinical presentation, gross path)
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presence of endometerial glands or stroma outside the uterine cavity. This tissie remains (partially) hormonally responsive and undergoes cyclic menstual changes with periodic bleeding.
Sites - ovaries, uterine ligaments, rectovaginal septum, pelvic peritoneum, lapartomy scars, and rarely the umbilicus, vulva, vagina, or appendix. Epi - disease of repro years (30-40's). 10% of women clinical manifestations: severe dysmenorrhea, menstrual irregularities, recurrent pelvic pain, 30-40% infertility. pain on defectation or dysuria if rectum/bladder involved. Gross - foci appear red-blue to yellow-brown subserosal nodules. In extensive disease, organizing foci of hemorrhage can cause extensive fibrous adhesions between ovaries, tubes, and other intrapelvic structures. Ovaries may become markedly distorted by large hemorrhagic cysts (chocolate cysts). Micro - endometrial stroma or endometrial glands, and hemosiderin pigment. |
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Pathophys theories of endometriosis
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1) The regurgitation theory that involves retrograde menstruation through the fallopian tubes.
2) The metaplastic theory that involves de novo formation of endometrium from the coelomic epithelium. Ovarian endometriosis is mostly derived from a metaplastic process. A good example is the demonstration of “Initial Endometriosis”. 3) The vascular or lymphatic dissemination theory that involves dissemination through the pelvic veins and lymphatics and explains the presence of lesion in distant location such as lungs. |
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Adenomyosis
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endometrial tissue deep within the myometrial wall (at least 2-3 mm beneath basalis) with connection to the surface endometrium (may represent downgrowth of endometrium into the myometrium). Cause unkown, 20% of uteri.
Hemorrhage within these small nests menorrhagia, colicky dysmenorrhea, dyspareunia, and premenstrual pelvic pain. Gross - variable thickening of myometrium and numerous hemorrhagic cysts. Microscopically, there is invagination of the basalis with irregular nests of endometrial stroma with/without glands. |
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Warfarin (teratogen)
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POM - growth deficiency, severe nasal hypoplasia, calcific stippling of the epiphyses of the long bones.
Critical pd is 6-9 wks. crosses placenta Give heparin instead (does not cross placenta) |
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Isotretinoin (teratogen)
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POM - microtia, anotia (small/absent ear), CNS defects, thumic abnormalities, cardiac defects. Seein in 30% of pregnancies exposed in 1st trimester. inc risk of neurodev problems. iPLEDGE program
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Lithium (teratogen)
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POM - heart defects, esp. Ebstein's anomaly (tricuspid valve prob).
Risk is 1-5%. Monitor serum levels throughout pregnancy |
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ACE inhibitors/ARBS (teratogens)
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POM - assoc with heart defects. Renal tubular dysplasia --> oligohydramnios, Potter's signs, pulmonary hypoplasia.
blocks fetal ACE activity affecting system/renal hemodynamics. 2nd and 3rd trimester use |
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Valproic acid (teratogen)
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POM - facial abnormalities like low hairline, wide set eyes. Heart defects, neural tube defects (1-2%). Highest risk of neurodevelopment problems are seen with valproate-exposed babies (in comp to other anticonvulsants)
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Tetrycycline (teratogen)
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POM - teeth discoloration
Critical pd is after 4 mos |
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Mercury (teratogen)
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congenital minamata disease: mental retardation, dysarthria, chorea, ataxia, hypersalivation, abnormal reflexes, growth retardation. (pregnant women shouldt ear fish > 12 oz)
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Diabetes (maternal metabolic state ~ teratogen)
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inc risk to fetus up to ~8%. POM - abnormalities of spine and lower extremities, heart, kidney.
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Maternal PKU (as teratogen)
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High levels are toxic to developing brain and heart. mom should go on stringent PKU diet prior to attempting a pregnancy.
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Ionizing radiation
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Timing:
Interestingly, even VERY high dose exposures is during Preimplantation = NOT associated with malformations! Although 70% embryonic LOSS rate is estimated! Organogenesis: Most susceptible period Doses of 5 rads or less = NO malformation or growth retardation Growth and differentiation Doses of 10 rads or less = NO malformation or growth retardation! Microcephaly Mental retardation Seizures Growth retardation Minor anomalies of the yes Increased risk of carcinogenesis Radiation exposure exampls: Chest XR = 0.1 rad Spiral CT = 5 rad |
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Cocaine
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And related methamphetamine agents = two most common illicit drugs used during pregnancy
o Associated problems: Miscarriage Premature delivery Placental abruption o PofM: Sympatheomimetic properties = contracted blood vessels and increased heart rate Results in hypoxic fetal blood flow = vascular disruption and cerebral infarctions! |
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Fetal hydantoin syndrome (Dilantin)
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POM: growth deficiency, neurodev delay, microcephaly, wide set eyes, low anterior hairline, short fingers, with nail hypoplasia. risk is 10-15% in exposed children.
Metabolized through arene oxide pathway (epoxide hydrolase). Tegretol kids have similar phenotypes. |
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Acute mastitis
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Limited to lactating breast.
Symptoms - painfel, erythematous breast, usually w/ fever Treat - antibiotics for S. aureus, or streptococci. Note - inflammatory breast cancer looks a lot like acute mastitis, so if this presents in a nonlactating woman suspect cancer! |
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Periductal mastitis (recurrent subarerolar abscess)
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Epi - women AND men. 90% are smokers!
Px - painful erythematous subareolar mass that often recurs. Patho - duct rupture with intense chronic and granulomatous inflammation in response to spilled entrapped keratin that accumulates from keratinizing squamous epithelium, extending t an abnormal depth in the nipple ducts. Treat - surgical. Antibiotics is superimposed infection |
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Mammary duct ectasia
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Epi - 5th/6th decade. Not assoc with cgarette smoking
Px - poorly defined palpable periareolar mass, often with thick white nipple secretions. Can be mistaken for cacinoma. |
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Fat necrosis
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Epi - hx of trauma
Px - painless palpable mass or mammographic abnormality that can be confused with breast cancer. |
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Fibroadenoma
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Epi - most common benign tumor of female braest. Frequently <30 years, but any premenopausal age.
Px - Palpable mass in young or mammographic abnormality if older. Can be bilateral & multiple. Waxes and wanes during menstrual cycle since hormonally sensitive. Histo - delicate, often myxoid stroma enclosing glandular and cystic spaces lined by bilayered epithelium. Stroma becomes hylanized with aging. Note - no well-defined risk of breast cancer |
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Phyllodes Tumor
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Epi - most present in 6th decade. Uncommon tumor (also intraloular)
Px - usually palpable mass. Few cm to huge, bulbous protrusions and slit-like spaces. Histo - similar to fibroadenoma but more stromal overgrowth, infilitrating margins, and greater cellularity, mitotic rate and nuclear pleomorphism Treat - excision with wide margins to prevent local recurrence Note - most are low-grade and indolent but can be high grade and aggressive with features of soft tissue sarcoma |
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Fibrocystic changes (nonproliferative breast changes)
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Epi - esp in 4th and 5th decades
Px - nodularity or lumpy bumpy changes usually without a dominant mass. May be asymptomatic, but frequent premenstrual tenderness and nodularity abating with menses. Histo - Cyst formation, freuently with apocrine metaplasa, fibrosis. Increased # acinar units per lobule (adenosis). Note - have to exclude carcinoma. This is grossly present in 20% and histologically in 59% - w/n spectrum of normal breast. |
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Proliferative breast disease without atypia
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Px - rarely masses, but can mammographic abnormality or an incidental finding in biopsy.
Histo - moderate or florid epithelial hyperplasia (>4 cell layers). Sclerosing adenosis (2x normal acini in terminal duct). Complex sclerosing lesions (radial scar), papillomas (peripheral small ducts), fibroadenoma with complex features. Note - 1.5 - 2x risk of invasive breast carcinoma |
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Proliferative breast disease With Atypia
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Gross has two types:
1) Atypical ductal hyperplasia (ADH) is similar to ductal carcinoma in situ but is quantitatively or qualitatively insufficient. 2) Atypical lobular hyperplasia (ALH) similar to lobular carcinoma in situ but does not fill or distend >50% of acini within a lobule. Clinical: ADH presents in 5-17% of biopsies for clinical calcifications, densities, or palpable masses. ALH is always an incidental finding (no mass or density). 4-5x risk of invasive breast cancer! |
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Incidence and Epi of Carcinoma of the Female breast
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Incidence:
- most common non-skin malignancy in females. 1 in 8 chance of developing breast cancer for women living to age 90. Risk factors - age (rare before 25, avg. age 64), early menarche, age at first live birth (risk if older or no kids), 1st degree rel with bCA, prior breast biopsy with atypical hyperplasia, race (White>Black>Asian>hispanic), estrogen exposure, breast densitym radiation exposure, carcinoma of other breast or endometrium, geography, diet, obesity, excerise, breast-feeding etc. Note - virtually all adenocarcinomas |
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Ductal Carcinoma in situ
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Several patterns - cribiform, solid, papillary, micropapillary, comedo
Epi - 15-30% of all carcinomas. But ductal type is 80% of CIS. Malignant population of cells limited to ducts and lobules by basement membrane. Risk - 8-10X for invasive carcinoma |
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Lobular Carcinoma in Situ
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20% of CIS is lobular type. Always incidental finding bc there are no calcifications, density, or mass
Histo - acinar units filled and distended by non-cohesive small cells. Epi - occurs in younger women (80-90% premenopausal) Risk - 8-10X for invasive carcinoma |
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Paget's disease of nipple
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Epi - rare 1-2%
Gross - unilateral, red eruption with scale crust Patho - caused by DCIS cells extending from duct system into nipple skin. 50-60% have underlying palpable mass with invasive poorly differentiated cancer, overexpressing her2/neu receptor |
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Infiltrating Ductal Carcinoma NST (stats, px, histo, genetic patterns)
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Epi - 79% of total breast cancers
Px - present as palpable mass of mammo density. Mets usually to regional lymph nodes, lung, pleura, bone Gross - firm, irregular borders, gritty, and fibrotic with retraction Histo - malignant cells forming tubules,nests, cords and sheets in a fibrotic stroma, pattern and cell pelomorphism determines grade. Genetics - Hormone receptor status varies, Her2/neu varies. 5 major gene expression patterns: 1) Luminal A (40-55% of NST): ER positive, Her2/neu neg. well to moderate differentiated, slow-growing. respond to hormone therapy but usually not chemo 2) Luminal B (15-20%): ER positive but also frequently Her2/neu positive (triple+). Usually higher grade and more proliferative. More likely wth +LN. response to chemo 3) Normal breast expression-like (6-10%): Gene expression similar to normal. ER+ and Her2/neu negative. well-differentiated 4) Basal-like (13-25%): Triple neg (ER-/PR-/her2neu-). +/- BRCA1 mutations/ethnicity/young. High grade, high proliferation rate, frequent mets, usually aggressive with poor prognosis but a subset is sensitive to chemo. 5) Her2/neu positive (7-12 of NST%): overexpress Her/neu. Poorly differentiated and high proliferation rate. frequent brain mets. Respond to trantuzumab (but doesnt cross bbb) |
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Lobular carcinoma
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Epi - 10% of all breast cancers
Px - mass/density or in 25% cases as vague thickening. Mets to LN, but also to peritoneum, retroperitoneum, leptomeninges, GI tract, ovaries and uterus Gross: most hard with irregular margin but less tissue fibrosis Histo: Single file poorly cohesive (E-cadherin neg) tumor cells frequently infiltrating around ductal structures. Genetics: Usually ER/PR positive and do not overexpress Her2/neu |
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Medullary Carcinoma
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Epi - 2% of total
Px/Gross - well-circumscribed more yielding mass, fleshy, softer, frequently with rapid growth. Histo - pushing border composed of solid, syncytium-like sheets of large pleomorphic cells with lymphoplasmacytic infiltrate within and surrounding tumor. Genetics - does not overexpress Her2/neu, ER/PR negative. Common in BRCA1 gene mutations and 67% of all medullary carcinomas have hypermethylation of BRCA1 promoter Prognosis - slightly better than NST, LN usually negative |
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Mucinous (Colloid) Carcinoma
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Epi - 1-6% of all breat carcinoams, olde rpatients
Px - circumscribed, slow growing, soft mass. very soft grossy with blue-gray gelatin-like consistency Histo - clusters and islands of cells floating w/n lakes of mucin pushing into stroma. Genetics - usually hormone receptor positive. More common in BRCA1 mutations and BRCA1 promoter hypermethylation in 55% of non-germ line mutations. Prognosis - slightly better that NST |
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Tubular Carcinoma
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Epi - Up to 10% of all carcinomas <1 cm. Usually detected on mammo
Gross - 10-56% mutlifocal in one breast and 9-38% bilateral. Histo - exclusive well-formed tubules without myoepithelial cell layer. LCIS frequently present. Well differentiated. Genetics - >95% hormone receptor positive. Prognosis - excellent. axillary mets in <10% |
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Invasive Papillary Carcinoma
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<1% of total. Clinical presentation same as NST but better prognosis
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Inflammatory Carcinoma presentation
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Swollen, erythematous breast with skin thickening (peau de l'orange) that mimics infection. Symptoms caused by tumor invasion of dermal lymphatics. Presentation can delay diagnosis. Course is aggressive with usual axillary mets at diagnosis and poor prognosis.
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Male gynecomastia and cancer
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Px - unilateral or bilaterl subareolar enlargement due to hyperestrinism
Histo - proliferation of dense collagenous connective tissue with marked micropapillary hyperplasia of duct linings. Not assoc with cancer. Carcinoma - Rare, <1:100 frequency of female cancer. Usually aggressive bc presents t higer stae. Similar risk factors as women and increased in men with BRCA2 gene mutation |
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Endocervical polyp
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benign inflammatory tumors that arise within the
endocervical canal. They are relatively common and can be seen in 2% to 5% of adult women. They consist of a loose fibromyxomatous stroma lined by endocervical epithelium and range in size from small sessile lesions to large 5 cm pedunculated masses. Dilated, mucus-secreting endocervical glands, inflammation, and squamous metaplasia are common findings. They may present with “spotting” and bleeding raising suspicion of some more serious lesions. Treatment: surgical removal or endocervical curettage |
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CIN I, II, III
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CNI I. Histologically indistinguishable from condyloma
acuminatum. Characterized by viral cytopathic changes in the superficial layers of the epithelium (koilocytotic atypia). Associated with low-risk HPV. CNI II. Characterized by the appearance of dysplastic cells in the lower layers of the epithelium (increased nuclear to cytoplasmic ratio, hyperchromasia, increased mitotic activity, loss of polarity). Associated with high-risk HPV. CNI III. Characterized by full thickness dysplasia and minimal or no surface maturation. Associated with highrisk HPV. Highest risk of progression to invasive carcinoma. CIN is characterized by aceto-white lesions (white patches after the application of acetic acetic), and abnormal vascular patterns (mosaic or punctuation patterns). Any abnormalities should be confirmed by histologic examination. In challenging cases, immunohistochemical stains for cyclin E, Ki67, and p16INK4 may help distinguish precancerous lesions from reactive epithelial changes. The treatment of CIN depends on the stage of the lesion and includes follow-up with Papanicolau smear for CIN I, and cryotherapy, laser, electric loop excision procedure (LEEP), and cone excision for CNI II and III. |
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Bartholin Cyst
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Acute infection of the Bartholin gland can lead to adenitis (acute inflammation of the
gland) and abscess formation. Bartholin cysts are relatively common, can occur at any age, and result from obstruction of the gland duct, which is usually secondary to infection. These cysts can become quite large (up to 5 cm) resulting in significant local discomfort and pain. The treatment is surgical removal or marsupialization of the cyst |
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Vulvar vestibulitis
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s characterized by
inflammation of the surface mucosa and submucosal vestibular glands, and formation of small superficial ulcers. This condition leads to chronic, recurrent, exquisite pain. The cause is unknown and the treatment consists of surgical excision of the inflamed mucosa. |
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Lichen Sclerosus
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o atrophy, fibrosis, and
scarring of the vulva. On physical examination, the vulvar skin is pale gray and parchment-like. On long-standing cases, the labia become atrophied, and the introitus narrowed. Microscopically, there is atrophy of the epidermis, hydropic degeneration of the basal cell layer, severe fibrosis of the dermis, and band-like monoclonal lymphocytic infiltration of the lower dermis. Although the pathogenesis is not completely understood, many of its features suggest an autoimmune origin. This disorder can occur at any age, but has a predilection for postmenopausal women. It tends to be insidious and progressive. It is not considered a premalignant condition, but it is associated with a greater risk of subsequent carcinoma (1% to 4%). |
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Lichen Simplex Chronicus
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Lichen simplex chronicus, formerly known as hyperplastic dystrophy, is a nonspecific
condition that manifests clinically as leukoplakia and it is the result of rubbing or scratching the vulvar skin to relieve pruritus. Its causes include infections (tinea, candida, etc.), mucosal irritation due to chemical exposure, and other causes of pruritus. Histologically, this disorder is characterized by acanthosis (thickening of the squamous epithelium), hyperkeratosis, increased mitotic activity, and variable leukocytic infiltration of the dermis. Similar to lichen sclerosus, lichen simplex chronicus is not considered a premalignant lesion, but it is associated to a greater risk of carcinoma. |
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Papillary Hydradenoma
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This tumor is histologically identical to the intraductal papilloma of the breast. It
presents as a well-circumscribed nodule in the labia majora or interlabial folds. Because of its tendency to ulcerate it may be confused clinically with a carcinoma. Microscopically, it is characterized by tubular ducts lined by nonciliated columnar cells surrounded by a layer of myoepithelial cells. |
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Condyloma Acuminata
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Condylomata acuminata are sexually transmitted, papillomavirus-induced, benign
tumors that have a characteristic verrucous gross appearance. They involve perineal, vulvar, and perianal regions, and are usually multiple. Histologically, they consist of a branching, tree-like proliferation of stratified squamous epithelium supported by a fibrous stroma. The squamous epithelium shows acanthosis, parakeratosis, hyperkeratosis, and viral cytopathic effect (koilocytotic atypia). Koilocytes are virally infected cells characterized by hyperchromatic, raisinoid nuclei, and perinuclear vacuolization or clearing of the cytoplasm. Human papillomavirus (HPV) is the causal agent of condyloma acuminatum, with HPV 6 and HPV11 being the most commonly ZHENG: Diseases of Vulva Vagina and Cervix 6 implicated types. In the immunocompetent host, this tumor usually resolves spontaneously. This entity is a marker for sexually transmitted diseases and is not considered a premalignant lesion. |
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Categories of Vulvar Carcinoma
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Lesions associated with high-risk HPV (types16, 18
and others). This variety of carcinoma is usually coexists or is preceded by classic VIN. These tumors can be exophytic or indurated, and are frequently ulcerated. Microscopically, they are characterized by an invasive growth pattern, and can be well-differentiated (warty) or poorly-differentiated (basaloid). 2)Lesions associated with lichen sclerosus/squamous hyperplasia. The etiology is unclear and some of these lesions have been associated with accumulation of p53 protein. They occur as rapidly growing nodules in a background of inflammation. Microscopically, they are characterized by prominent keratinization. |
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Paget disease of the vulva
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Paget disease of the vulva is a rare condition that is similar, grossly and
microscopically, to its breast counterpart. It usually presents as a pruritic, red, sharply demarcated, geographic lesion usually located on the labia majora. Occasionally, a palpable submucosal thickening or tumor is identified at the time of diagnosis. Microscopic examination reveals large neoplastic cells within the epidermis and its appendages. The tumor cells are surrounded by a clear halo and have relatively abundant, finely granular, pale cytoplasm that stains with mucin stains. In sharp contrast to Paget disease of the nipple, extramammary Paget is almost always confined to the epidermis and its appendages, and is rarely associated with an underlying tumor. Staining: Keratin +, PAS +, CK7 +, HMB45 -, S100 - |
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Malignant melanoma of vulva
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Malignant melanoma of the vulva is a rare lesion that accounts for less than 5% of all
malignant vulvar cancers and 2% of all melanomas in women. Most cases occur in the sixth of seventh decades of life. The microscopic features and clinical behavior are similar to those of melanomas located elsewhere. Grossly and microscopically, vulvar melanoma may resemble Paget disease. The 5-year survival rate is less than 32% and the prognosis is closely linked to the depth of invasion of the tumor. (Staining: keratin neg, s100 Positive, PAS neg) |
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Embryonal Rhabdomysarcoma
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Embryonal rhabsomyosarcoma, also known as sarcoma botryoides, is an uncommon
vaginal tumor that presents during infancy and early childhood. On gross examination, the lesion has a characteristic appearance: semi translucent polypoid masses that resemble clusters of grapes (hence the term botryoides that means grapelike). The tumor is composed of malignant rhabdomyoblasts lying within a myxomatous stroma. There is a characteristic crowding of the neoplastic cells immediately beneath the vaginal epithelium, forming the so-called cambium layer. Because of the presence of inflammatory cells, these lesions are sometimes mistaken for inflammatory pseudopolyps. These lesions invade locally and cause death by invasion into the adjacent organs and peritoneal cavity. Conservative resection and chemotherapy are the treatment of choice in patients diagnosed early. |
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Adenocarcinoma of the vagina
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Adenocarcinoma of the vagina is a rare neoplasm. Patients whose mothers received
diethylstilbestrol (DES) during pregnancy are at an increased risk of developing clear cell adenocarcinoma. Most of these cases occur during the second decade of life. The tumors are usually located on the anterior wall of upper third of the vagina, and range in size from a 0.2 to 10 cm. Microscopically, they are characterized by vacuolated, glycogen-containing glandular cells. Vaginal adenosis appears to be the precursor lesion and occurs in 35% to 90% of patients with history of antenatal exposure to DES. |
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Leiomyosarcoma
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- bulky, fleshy SINGLE mass
- necrotic with hemorrhage - age 40-60 yrs, but postmenopause - Cellular atypia - arises de novo - Mets via hematological, intra-abdominal - 5 Year survival is 40%. Worse if anaplastic type (10-15%) |
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Endometrial hyperplasia
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Def - excessive gowth of endometrial tissue (glands and stroma) with tissue architectural alterations.
Epi - occurs in later repro years and early post-menopausal. Causes - prolonged estrogen stimulation of the endometrium (like in PCOS, or HRT, estrogen sec tumor) Symptoms - abnormal bleeding Classifications: simple (more glands, irregular), complex (more dense packed glands with marked irregular size/shape), with or without atypia (nuc enlargement, pleomorphism, prominent nucleoli, coarse chromatin, loss of cell polarity). Treatment - remove source of estrogen, curettage, prog suppression, hysterectomy Clinical course - Transfusions, hormones Risk - depending on type risk for adenocarcinoma type 1. |
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Endometrial carcinoma type I (endometriod)
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Estrogen-driven with endometrioid histo (like normal but not quite endometrium). Type I is 80% of endometrial CA.
Epi - Older than40's, mainly 50-60s. Associations: early menarche, late menopause, unopposed HRT, obesity, diabetes, htn, infertility. Protective associations: OCPS with progesterone, breast feeding, full term pregnancy, combined HRT< excersie, smoking SYmptoms - post-menopausal bleeding |
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Endometrial carcinoma type II
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Non-estrogen driven. 15-20% of endometrial carcinoma. Occurs in older women (60-70s). Serous, clear cell, and carcinosarcoma. Usually nuclear grade 3 tumors (nuclei with dramatic atypia and pleomorphism).
Uterus remains small. background atrophic endometrium Histo - papillary structure lined by highly pleomorphic cells with abnormal hobnailed nuclei. |
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Carcinosarcoma (mixed mullerian malignancy)
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Definition: endometrial adenocarcinoma in which there is malignant stromal differentiation into BOTH epithelial and mesenchymal (muscle, cartilage, bone) components. Both components are believed to be from the same cell.
Cause - not related to estrogen. Epi - postmenopausal women Morphology - large mass, often beyond uterus at diangosis. Histo - adenocarcinoma with sarcoma elements., Course: determined by depth of invasion and stage. Carcinoma part metastasized more freq than sarcomatous part. |
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Placental hormones (and what they do)
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a. Human chorionic gonadotropin maintains the corpus luteum (secretes
progesterone) until the placenta can synthesize adequate progesterone to maintain the pregnancy. b. Human placental lactogen has anti –insulin properties and changes the metabolic state of the mother to increase availability of nutrients to fetus. Its major effect is to raise maternal blood glucose levels. c. Estrogen. Estrogen enhances uptake of LDL cholesterol for placental steroid production, increases uteroplacental blood flow, and increases prolactin synthesis. Estrogen may also be important for placental angiogenesis, thus boosting fetoplacental nutrient transport. d. Progesterone stimulates maternal food intake and suppresses maternal cell-mediated immunity to prevent rejection of the fetus |
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Why can endometriosis lead to infertility?
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40% of endometriosis --> infertility
-pelvic adhesions - functional abnormalities of endometrium and tubes - production of substances that interfere with normal ovulation (cytokines, growth factors) -inc levels of anti-endometrial antibodies |
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Alcohol (and other recreational drugs) as a teratogen
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Produces Fetal Alcohol Syndrome
o PofM: Growth retardation Developmental/behavioral abnormalities Facial feature abnormalities: Microcephaly Microphthalmia Short nose Smooth philtrum Thin upper lip o Most preventable cause of mental retardation in the world! o Timing 10% risk of FAS to those offspring of chronic alcoholic women 30% risk of some observable adverse effects – not full FAS Other: Many agents are not associated with malformations but can have neurobehavioral effects instead: Marijuana, LSD, heroin, barbiturates, and stimulants |
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Pediatric vs. Adult patient drug selection and therapy
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o Age - pharmokinetic properties change with age.
o Body Size - dose for mg/kg/dose o Disease o Organ function Drug conc same for adult and kids for same disease. But some drugs are not for kids (Aspirin --> reye's syndrome). Off label drug use in kids is common. |
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Peds factors for route of administration
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Delivery:
1) Oral route: pH at birth = 6-8 but drops to 1-3 within 24hrs (problem with absorption for preemies bc ph stays high). Active and passive transport develop fully at 4 months Effect of low acid secretion (high pH): o INCREASED concentration of weak bases (inc absorption of penicillin g) and acid-labile medications o DECREASED concentration of weak acid medication due to increased ionization (dec absorption of phenobarbital) - Gastric emptying times: DELAYED in premature infants. Results in increased contact time in the GI mucosa = increased amount absorbed! Reach adult values in 6-8 months - Pancreatic exocrine and biliary function Reduced and variable in neonates – 50%. Reach adult values by age 5. Results in decreased bioavailability of drugs requirinh solubilization or intraluminal hydrolysis like prodrugs (erthyromycin) 2) Topical/percutaneous admin - absorption inc in preemies bc of thinner stratum corneum, inc skin perfusion, and inc body surface to weight ratio. use the smallest amt possible 3) IM - variable perfusion not ideal bc of less muscle 4) Rectal - variable absorption, not ideal (diazepam gel, acetaminophen, glycerin) Other considerations: 1) Intravenous formulations: Some medications may require further dilution to measure smaller doses/ To reduce irritation. Some medication may need to be concentrated for fluid-restricted patients like preemies with cardiac probs |
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Peds - volume of distribution
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1) Extracellular fluid (ECF) vs total body water (TBW): Neonates and Infants have increased fluid = higher Vd for WATER SOLUBLE drugs = need a higher dose to get same therapeutic concentration (Fluid then decreases with age).
2) Protein binding: Binding protein determines how much unbound/active fraction is available Neonates and infants Have a LOWER normal range of serum albumin = lower dose for LIPID SOLUBLE drugs 3) Body fat is LOWEST in neonates, increases with age . However Vd for infants vs adults is fairly similar for lipophilic medications. In theory, premature and infants have lower Vd = lower doses for lipid soluble drugs 4) Blood-brain barrier: NOT well developed in premature neonates and infants compared to older children and adults --> INCREASED distribution of lipid soluble medications into CNS! Some lipid-soluble compounds can reach 10-30x infant serum amounts! 5) Protein Binding - Neonates and infants have a lower normal range for serum albumin. Decreased protein binding of drugs resulting in increased unbound fraction (ex: phenyton is 20% unbound in neonates vs. 10% in adults) |
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Peds - metabolism/hepatic
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Slow Phase I reaction systems: Oxidation, CYP P450, Alcohol dehydrogenase. NEED TO WATCH doses closely for patients < 6mo for drugs given metabolized by these systems (Include elixir forms of medications that contain some alcohol!) Peak rate is 4-6
o Phase II reaction systems: Matures at different rates during 1st year of life - Sulfation is well-developed in newborns - Glucuronidation and acetylation is underdeveloped in neonates and infants. Takes 1-2 years to get to adult level o Can cause grey baby syndrome with chloramphenicol usage o Acetaminophen is okay due to sulfation - Neonates and infants Require LOWER mg/kg/day doses of hepatically metabolized drugs - Young children – 1-9yrs Actually have the MOST rapid hepatic drug metabolism = higher does for some medications. Peak for hep metab is 4-6. - Growth to puberty: Hepatic metabolism and clearance slows significantly to adult level |
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Peds - elimination/clearance
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1) Neonates and Infants: Renal clearance is SLOWEST in premature neonates --> Results in LONGER dosing intervals for certain medication
2) Children and adolescents have the MOST rapid drug elimination of all age groups when adjusted for body size (ages 3-12). Therefore require more frequent dosing (ex. vancomycin). Clearance similar to adult with older age o Renal drug clearance varies widely in size and therefore normalized based on body size = ml/min/m^2. Mainly measured by glomerular filtration = estimated from the creatinine clearance. GFR increases quickly in the 1st month of life. Continues to increased during 1st 4 months and then stabilizes Cockroft and Gault (C-G) equation ONLY used in patients > 18 years. NOT FOR CHILDREN o Based on gender, age, ideal body weight, and SCr - FOR KIDS: Schwartz equation (6 mo - 21 yrs) o Based on age/gender constant, length, and SCr - Traub-Johnson equation: Based on height and SCr with a constant of 0.48, For patients 1-18 yrs old for both gives rate as ml/min/1.73m^2 |
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Common meds errors
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Errors can easily occur with pediatric medications:
Accuracy of body weight o CHECK kg vs. lb and g vs. kg Decimal and order interpretation o Trailing zeros – 1.0mg vs 1 mg o Missing leading zeros – 0.1mg vs .1mg Calculations: o Dose per kilogram errors o 10 fold decimal/calculation errors o Mg vs. mcg or mg/dose vs mg/d o Dosing errors of combination products Look-alike durgs o Epinephrine strength – 1:1000 vs. 1:10K o Heparin strength o Similar appearing labels/units – heparin vs insulin How to prevent/minimize errors? o Simplify medication use o Order standardized/correct concentrations and doses o Use bar codes o Standardize infusion equipment o Standardize drug concentrations for high risk medications o Check medications at point of care and monitor therapy |
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Pharmacodynamics peds diferences
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1) PK affects PD, for example with Safety
Example: slower clearance of gentamicin leading to increased incidence of nephrotoxicity with inappropriate dose 2) Efficacy: Receptor action in pediatric patients may not be the same as adults. Example: Tricyclic antidepressants and major depressive disorder |
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Complete hydatidiform mole
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Complete Mole:
Considered the “classic mole” Find swelling of ALL or most chorionic villi + DIFFUSE trophoblastic hyperplasia KEY is that it’s due to DIPLOID karyotype – 46 XX (>90% of cases) Crazy thing is all chromosomes are of PATERNAL derivation Over proliferation of syncytialtrophoblastic cells = overproduction of Beta-hCG Grossly: Mass of thin-walled, friable, semi-translucent, grape like structures filling the uterine cavity NO fetal parts are found! Micro: Hydropic swelling of choronic villi Diffuse hyperplasia Insufficient or ABSENT development of vascular elements within the villi Malignancy Potential: 10% evolve into invasive mole 2% or less evolve into choriocarcinoma |
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Partial hydatidiform mole
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only partially involves the chorionic villi
Find cystic degeneration and FOCAL trophoblastic hyperplasia KEY is that it occurs in triploid karyotypes – 69 XXX or 69 XXY, sometimes tetraploid – 92 XXXY) Grossly: Similar findings as classic moles but LESS pronounced Embryo is viable for weeks = formation of FETAL parts can be found! Rarely evolve into more aggressive lesions. Clinical: not as bleeding, uterine size +/- enlargement, Treatment: Thorough uterine curettage Anticancer medicine or hysterectomy Follow-up with Beta-hCG levels to monitor progress |
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Invasive mole
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Characterized as the PERSISTANCE of a molar pregnancy even AFTER evacuation
Find myometrial invasion by hydropic chorionic villi. There is continued proliferation of trophoblastic epithelium BENIGN in nature: o However locally invades with potential to perforate the uterine wall (rare) Luckily HIGHLY responsive to chemotherapy Complications: o Perforation of the uterine wall o Invasion of the parametrial structures o Vascular invasion o Tumor embolism to distant sites – NOT a true metastasis Clinically: o Recurrent vaginal bleeding o Irregular uterine enlargement o Persistently elevated Beta-hCG o Varying degrees of luteinization of the ovaries o Hemorrhagic complication/rupture of uterine wall can be LIFE-THREATENING |
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Choriocarcinoma
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This is a MALIGNANT neoplasm of the chorionic epithelium
Tends to be a RARE malignancy in the US: o 1/20-30K pregnancies! o 50% occurs in patients with history of GTD o 25% follow an abortion o 22% after an apparently normal pregnancy o RARELY occurs in ectopic pregnancy or teratomas Characteristics: o HIGHLY aggressive o Rapidly invasive with wide metastatic spread o Uniformly FATAL if left untreated o EXTREMELY sensitive to chemotherapy HUGE game changer as before cancer tends to be so rapidly invasive that we don’t catch it in time before metastasis Allows for 100% remission rates! Risk factors: o Maternal age > 35 years o Increasing parity o Prolonged use of oral contraception (> 5yrs) o Lower endogenous estrogen levels o Women who are: Asian American Indian African American Grossly: o Soft, fleshy, yellow-white tumor mass that INVADES the uterine wall o Extensive foci of hemorrhage, cystic degeneration, and necrosis Micro: o Neoplastic proliferation of BOTH cytotrophoblast and syncytiotrophoblast WITHOUT chorionic villi o Clinically: o Irregular, bloody, foul-smelling vaginal discharge o Occurs after normal pregnancy, miscarriage, or in a patient with history of hydatidiform mole o Widespread metastasis is constant find at time of diagnosis – preferred sites: Lungs – 50% Vagina – 30-40% Brain, liver, and kidney Treatment: o Depends on stage of tumor o Evacuation of uterine contents o Hysterectomy – rarely done o Chemotherapy – most efficient o Follow up with beta-hCG levels |
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Placental site trophoblastic tumor
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Accounts for < 2% of GTD
Characterized by proliferation of INTERMEDIATE trophoblasts present at the residual placental site 50% of cases – after normal pregnancy 50% of cases – after abortion or a hydatidiform mole Clinically: o Beta-hCG levels may be high, but these cell types tend to secrete human placental lactogen (HPL) o Micro: o Invasion of myometrium by neoplastic population of mononuclear polygonal cells Prognosis: o Depends of stage and time interval between preceding pregnancy and diagnosis o MOST cases = good response to treatment (chemotherapy) 10% of patients develop disseminated disease = DEATH |
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Follicular cyst
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Arise in unruptured graafian follicles or follicles that ruptured but immediately sealed
o EXTREMELY common o Cysts that exceed 2cm = follicular cysts Those < 2cm = cystic follicle o Characteristics: Filled with clear serious fluid Lined by smooth and glistening membrane Composed of granulosa and outer theca cells Luteinized theca interna cells o Large cysts: Can cause pelvic pain and abnormal bleeding o Diagnosis: Physical examination Ultrasound |
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Luteal Cyst
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Normal cysts in the ovary that usually regress spontaneously
o However for some reason they persist o Grossly: Lined by a layer of luteinized granulosa and theca cells = bright golden yellow color to lesion Fluid content is often bloody Usually single Rarely > 6cm o Advanced lesions = difficult to distinguish from endometriotic cysts o Clinically: Complain of pelvic pain Or dysfunctional uterine bleeding o Rare complication: Rupture leading to erroneous diagnosis of ruptured ectopic pregnancy |
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PCOS
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Characterized by the presence of numerous cystic follicles within the ovary
o Classic clinical picture: Stein-Leventhal syndrome = PCOS Find persistent anovulation, amenorrhea, obesity, hirsutism, and rarely virilism o PCO does NOT = PCOS o Pathogenesis: Not completely understood However thought to be related to elevated LH levels Results in abnormal regulation of enzymes used to synthesize androgens o Associations: PCO and insulin resistance = DM in many patients Increases cardiovascular disease Also increase risk of endometrial cancer Type I Due to overproduction of estrogen by MANY cystic follicles in the follicular phase of the cycle o Micro: Due to proliferation of granulosa and theca intera cells, oddly there is increased production of Inhibin by Theca cell > Granulosa cells o Treatment: Oral contraceptives Induction of ovulation Wedge ovarian resection – rarely used Screening for diabetes, hyperlipidemia, and hypertension |
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Stromal hyperthecosis
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uniform enlargement of the ovaries (up to 7cm) have a diffusely white to tan appearance
on cross section o Micro: STROMAL hypercellularity Can be 2 types: Stromal hyperplasia – NO luteinized theca cells Stromal hyperthecosis – with luteinized theca cells o Occurs most commonly in POSTMENOPAUSAL women Also associated with PCO in younger patients o Clinically: Similar to PCO disease with virilization being a striking feature Elevated LH, androgen levels, and DM etc) o Treatment: Surgical resection of ovaries |
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Suppurative vs. tuberculous salpingitis (and why it can lead to infertility)
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Suppurative Slapingitis:
o This is an acute inflammatory process involving the fallopian tubes o Any pyogenic microorganism can be causal agent, Neisseria gonorrheae = 60% of cases Causes pelvic inflammatory disease (PID) Important cause of infertility due to scarring of the tubes = inhibition of fertilization Also commonly caused by Chlamydia o Micro: Edema and acute inflammation of tubal wall + dense fibrinopurulent infiltrate within lumen = abscess Tuberculous Salpingitis: o EXTREMELY rare in the US = < 2% of cases o In areas of the world where TB is more prevalent = more common condition o Micro: Classic necrotizing granulomas seen in tuberculosis |
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Ectopic pregnancy ( most common anatomical sites,
predisposing factors and possible pathophysiological outcomes.) |
Occurs when implantation of the fetus occurs at any site OTHER than the uterine cavity
Most common place is within the fallopian tubes (90%) o Ovaries, peritoneal cavity, and intrauterine portion of the fallopian tube are other locations o At the site of implantation, fertilized egg undergoes usual development = formation of placenta, amniotic sac, and fetus Epidemiology: o Occurs 1/150 pregnancies o Predisposing factors: PID with chronic salpingitis – 35-50% of cases Peritubal adhesions – endometriosis, appendicitis, previous surgery Intrauterine devices o Interestingly, 50% of cases occur in apparently NORMAL tubes! Pathophysiology: o Placental tissue will continue to invade wall of the tube = can lead to tubal rupture and intraperitoneal hemorrhage = hemoperitoneum! o Other cases – partial separation of the placenta without rupture of the tube = intratubal hemorrhage or hematosalpinx o Other outcomes – spontaneous regression with resorption of the pregnancy Micro: o All histologic elements of a normal pregnancy can be found Clinically: o EP with tubal rupture: ACUTE ABDOMEN = medical emergency Severe abdominal pain that can progress to rapid fall into shock-like state History of missed menstrual cycle History of PID Treatment: o Diagnosis: hCG levels U/S studies Laparoscopy o Treatment: Medical – methotrexate Surgical – salpingectomy |
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Paratubal cyst
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These are minute translucent cysts filled with clear fluid (<2.0cm)
Believed to arise from remnants of the mullerian duct = no clinical significance Those larger cysts found near the fimbria or the broad ligament = hydatids of Morgagni |
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Adenomatoid tumor
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benign tumor are small nodules occurring in the subserosa o the tube and occasionally in the mesosalpinx. (also in testes and epididymus)
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Primary adenocarcinoma of fallopian tube
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Primary - the bulk of the tumor must be in the fallopian tube. limen of the tube has to be involved, and the lesion has to arise from the tubal mucosa. Microscopically, tubal adenocarcinoma usually exhibits a papillary architecture with tubal differentiation.
Clinical: abnormal dischage (watery discharge in elderly woman), bleeding. sometimes abnormal pap smear. SOme of these lesions carry BRCA germlike mutations. |
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Theory - fallopian tube as source for ovarian and peritoneal serous carcinomas
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Starts in tubes as a precancerous lesion – dysplasia or tubal intraepithelial carcinoma
Then with sloughing off or rubbing against ovaries, malignant cells get STUCK to ovary = secondary ovarian cancer KEY is that tubal fimbria FREQUENTLY contain in situ serious carcinomas with a alternation of p53 = signature find for tubal origin Cells either rub off onto ovaries, or fall from fimbria into peritoneal cavity |
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Hormonal influences in PMS/PMDD
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- normal hormonal cycling leads to reduced levels of serotonin in late luteal phase (triggering symps of irritability, dysphoria, carb craving). Acute depletion of tryptophan too (sero precursor)
- low GABA levels low in late luteal phase - More SHBH --> % of free estradiol much lower, esp in luteal phase - P4 (progesterone) rises in luteal phase. So is it the relative E2/P4 balance contributing??! - low allopregnanolone |
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Reqs. for diagnosing PMDD
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1-4 of the following symptoms
Depressed mood or dysphoria, anxiety or tension, affective lability, irritability And at least 4 of the following (dec interest in usual activities, concentration difficulties, marked lack of enregy, change in appetite, sleep change, feeling overwhelmed, physical symptoms like breast tenderness, bloating). Symptoms must interfere withw ork, school, usual activities, or relationships. Can't be an exacerbation of another disoerder. All criteria must be confirmed by daily ratings for at least 2 consecutive cycles. symptoms MUST begin in late luteal phase and dissipate by the end of menstrual flow. |
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Early transition vs. late transition (MP)
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Early - increased variability mc length. greater than a difference of 7 days from cycle to cycle. FSH increases, inhibin decreased.
Late - skipping of meses in which the typical mc length is doubled or longer. Rising FSH. In general FSH > 20 IU/L and estradiol lower than 60 pg/ml indicate reduced ovarian function. Hot flashes peak within the year before final period and on average continue through 3 years after. |
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0-2 months (motor, social, adaptive, problem-solving, language)
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GM: Can lift head briefly at birth.
By 2 months, can lift up chest FM: Hands are tightly fisted at birth. By 2 months hands are >50 unfisted visual fixation, auditory VS: alerting at birth, tracks horizontally at 1 month, vertically at 2 months Language: R: alerts to sounds at birth, regards speaker and socially smiles by 2 mo. E: throaty noises, cries at birth. coos by 2 months |
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6 months (motor, social, adaptive, problem-solving, language)
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GM: Rolls both ways starting prone to supine at 4
months and progressing supine to prone at 5 months. At 6 months, sits propped, FM: Starts raking using entire hand at 4 months (ulnar) transitions to raking with the radial aspect of the hand by 6 months, transfers objects hand to hand at 6 months. Develops stranger awareness: prefers to be with family members, but will allow others to hold or comfort, especially if a family member is nearby Emerging object permanence: Looks to floor when drops toy, attains partially hidden toy, removes cloth covering face E: sing-song vocalizations and babbling by 6 months RL: Orients to sounds by looking directly towards the location of the sound (little seeking) |
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12 (motor, social, adaptive, problem-solving, language)
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GM: Cruises at 10 months, takes a few step at 12 months
FM: Immature pincer at 9- 10 months. By 12 months, mature pincer, release of cube into cup, attempts release of pellet Proto-imperative point (A child points to an item to obtain it). Cooperates with dressing Recognizes patterns: Looks selectively at round hole in formboard, Object permanence: removes lid to find toy. R: By 10 months, understands “no” and recognizes own name. By 12 months, follow a command with gestures E: By 10 months usually has a vocalization for a parent, echolalia is common from about 7-30 months. By 12 months has 1-2 words, immature jargoning |
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18 (motor, social, adaptive, problem-solving, language)
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GM: climbs on furniture at 15 months. By 18 months, can push/pulls large object, throws ball while standing, seats self in small chair
Proto-declarative point by 15 months (A child points to an item to point it out to an adult; the goal = adult attention) Drinks from cup without spilling, imitates household tasks, hugs parents, plays in company of other children, symbolic play directed to doll, VS: Matches pairs of objects, circle in formboard reversed, round pegboard, finish (spont.) spontaneous scribble, imitates single stroke, tower of 4 R: 3 body parts, Points to self: E: 10-25 words, giant words, names one picture, mature jargon |
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24 (motor, social, adaptive, problem-solving, language)
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Jumps in place, kick ball, walks down stairs with rail, throws overhand
S/A: Parallel play, uses spoon well, removes clothes without buttons Sorts objects, matches objects to pictures, attempts to fold paper R: 2-step command, understands me/you E: two word phrase N+V, 50+ words, refers to self by name, pronouns inappropriately (I, me, you) |
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36 (motor, social, adaptive, problem-solving, language)
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G: up stairs,alternating feetheel walk
toe walk pedal tricycle S/A: independent eating, cut with scissors, toilet trained. string small beads VS/VM: draw circle, build bridge L: Age boy/girl first and last name, plurals and past tense correctly, three word sentences what sleep in? write with? hear with? |
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PKU
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o Characterized as elevated blood phenylalanine = need to restrict dietary sources
o Clinically: Causes severe mental retardation if untreated o Incidence = 1:15,000 Variety of genetic forms – most common is “classic” PKU = remain on low phenylalanine diet for life o Cause: Defective phenylalanine hydroxylase found only in the liver Used to convert phenylalanine to tyrosine and require tetrahydrobiopterin as a cofactor 1-2% have defect in the synthesis of the cofactor o Treatment: Needs to occurs as phenylalanine is an essential amino acid = cannot be made by body Patients placed on low phenylalanine medical food and formulas Problem is diet must be maintained for life = difficult and expensive |
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MSUD
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o Defect in leucine, isoleucine, and valine metabolism
o Results in ketonuria, irritability, and poor feeding by 48 hrs of age o Life-threatening = causes severe neurological damage Lethargy, apnea, opisthotonas by day 5 and then into coma o Treatment: Protein restriction and high calorie Branched chained AA free formula |
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Medium-chain acyl-CoA dehydrogenase deficiency – MCAD
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Testing is done indirectly by mass spectrometry of accumulated acylcarnitines
o Carnitine is necessary for fatty acid oxidation, therefore by determining the type of fatty acid bound to carnitine in excess can indicate the block in the pathway MCAD: Results in defects in breakdown – beta oxidation – of fats o During starvation mode, main energy source is from beta oxidation, especially for liver, heart, and skeletal muscle. Therefore with deficiency, patient begins to have symptoms 12hrs post last meal (infants), 24hrs in adults. o Symptoms include: Hypoglycemia, rhabdomyolysis, cardiomyopathy, recurrent Reyes-like attacks o Treatment: Avoiding fasting and supplementation with carnitine If there is severe liver or heart damage, then transplant effected organs |
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Sickle cell
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Major reason for screen = prevent sepsis from encapsulated bacteria as spleen is most likely to be damaged
o Tend to be put on penicillin prophylaxis |
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Biotinidase deficiency
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o Biotin is an essential vitamin used as a cofactor for enzymes (the carboxylases)
o holocarboxylase synthetase adds biotin to these enzymes o When enzymes are degrades, lysine remains attached to biotin = called biocytin o Biotin is liberated via biotinidase to be reused in another enzyme o Incidence of deficiency in about 1/60,000 o Clinically: Ok for first 4 months due to stores of biotin Eventually stores are depleted and lost in urine in the form of biocytin Carboxylase enzyme reactions now malfunction Symptoms: Alopecia, seborrhea, seizures, hearing impairment, and developmental delay Without diagnosis = infants left neurologically damaged o Treatment: Very effective with biotin supplementation “take a pill every day and you’ll be cured” |
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Galactosemia
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Disorder of catabolism of monosaccharide galactose found a break down product of lactose
o any defect in 3 enzymes (galactokinase, galactose-1-P uridyltransferase (the biggie!) and UDP-galactose-4-epimerase o G1P Uridyltransferase defect = SEVERE disease o Clinically: Present with liver toxicity in the 1st 2 weeks of life = jaundiced and ill-appearing, elevated transminases, galactose in urine (reducing substance) Also see hypoglycemia, hepatitis, and cataracts Boards presentation: hepatitis, jaundice, E.coli sepsis o Treatment: Restriction of dietary intake of lactose Use lactose-free formula. Symptoms of intoxication rapidly reverse |
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Congenital hypothyroidism
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o Occurs at a frequency of 1:4K!
o 95% are due to defect in the formation of a thyroid gland (athyreosis) o End result is insufficient thyroid hormone o Clinically: Results in severe mental retardation and growth deficiency o Treatment: Exogenous thyroid hormone replacement |
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Cystic Fibrosis
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Autosomal recessive disorder in which there is a mutation in the cystic fibrosis transmembrane conductance regulator (CTFR)
o Clinically: Significant thickening of mucous in ductal tissues resulting in major damage to the pancreas, respiratory, and reproductive systems o Treatment: If early = improvement of nutrition and growth Genetic counseling of at risk families |
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Congenital deafness
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o Incidence is estimated to be 1:1000
o Identification = early speech therapy and hearing augmentation devices o Better long term speech preservation |
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Tanner staging breast
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Prepubertal; elevation of
papilla only • Breast bud stage; elevation of breast and papilla as a small mound • Further enlargement of breast and areola, with no separation of their contours • Projection of areola and papilla to form a secondary mound above the level of the breast • Mature stage; recession of the areola to the general contour of the breast |
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tanner staging female pubic hair
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I: Prepubertal
II: Sparse growth of pubic hair chiefly along the labia III: Hair spreads sparsely over mons IV: Adult type hair, smaller distribution V: Hair is spread to medial thighs |
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Male tanner pubic hair + other male signs
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I: Prepubertal
II: Sparse growth of pubic hair chiefly along the base of the penis III: Hair spreads sparsely over midline IV: Adult type hair, smaller distribution V: Hair is spread to medial thighs First sign of puberty in boys is testicular enlargement • Most of the increase in testicular size is due to seminiferous tubular development • Spermarche (appearance of spermatozoa in early morning urine occurs at a mean age of 13.4 years (Tanner stage III to IV) |
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Central vs. peripheral precocious puberty (def and examples)
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Definition:
Central Precocious Puberty – Premature reactivation of hypothalamic-pituitarygonadal axis – Increased secretion of GnRH • Peripheral Precocious Puberty – Non-GnRH-stimulated gonadotropin secretion – Secretion of sex steroids independent of hypothalmic GnRH and pituitary LH, FSH – Exogenous sex steroid or gonadotropin administration Gonadotropindependent (central) – Idiopathic (girls) – CNS abnormality (e.g. tumor, other) – Primary Hypothyroidism – HCG producing tumor (boys) Peripheral Gonadotropinindependent (peripheral) – Girls • Ovarian Cyst • Ovarian Tumor • Adrenal Tumor • McCune-Albright syndrome – Boys • Congenital adrenal hyperplasia • Testotoxicosis • Testicular (leydig cell tumor)Diagnosing Precocious Pube |
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Premature thelarche
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Usually appears in girls before age 3-4
• Transient (mean duration 2 years) • Age of onset of puberty is normal • Vaginal mucosa may be estrogenized, but no other signs of puberty are noted • Plasma estradiol is usually normal • GnRH test is pre-pubertal Premature thelarche may occur in those girls who secrete FSH longer than average or whose breast primordia is more sensitive to estrogens |
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Premature adrenarche
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Clinical signs of male androgen production (pubic
hair, body odor, acne) without signs of true puberty (no penis enlargement, testis or breast development) • Plasma DHEA-sulfate is early pubertal • GnRH test is pre-pubertal • High incidence of insulin resistance |
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Constitutional delay vs. hypogonadotropic hypogonadism
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Both have low prepubertal gonadotropins and low serum gonadal steroids.
CD: Patient usually has short stature for chronological age but appropriate height and growth for bone age. Adrenarche and gonadarche are delayed. just a late bloomer, runs in the fam. Growth may fall to 5% after birth and stay on that curve. GnRH stimulation test shows prepubertal response. bone age delayed. SPontaneous puberty results HH: Patient may have anosmia (Kallman) or other associated pituitary deficiencies. If gonadotropin deficiency is isolated, patient usually has normal height and growth rate. Adrenarche may be normal in spite of absent gonadarche (serum DHEA sulfate may be pubertal). |
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Hypergonadotropic Hypogonadism
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Elevated gonadotropins, but low serum gonadal steroids
Patient may have abnormal karyotype and stigma or Turner or Klinefelter syndrome. |
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LGBT health disparities
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Cigarette smoking
2x more likely to smoke than heterosexuals (both lesbians and gay) 38-59% of LGB youth vs 28-35% of hetero youth 30K LGB deaths related to tobacco disease o Alcohol and recreations drug use/abuse Increased risk for lesbian and bisexual women Alcohol, marijuana, cocaine, and others Gay and bisexual men: 35% - greater lifetime rates of cocaine, marijuana, MDMA, meth, and popper use. Alcohol use is similar to heterosexual men - Lesbians more likely to be overweight - Gay/bisexual higher lifetime eating disorder prevalence Both have more cardiovascular risk factor (stress?) Lesbians have lower screening rates for cervical cancer due to false assumption that they are not at risk, which is false. Still have to do pap for female to male transgender Lesbians possibly have more risk factors for breast cancer. (just treat them the same as other women) dont forget ftm patients. Anal cancer - x80 in MSM. Anal pap every 1-3 years. Other stis. Lesbians have greater risk of STIs (vaginosis) than other women. |
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Teratomas (embryonal germ cell tumor)
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Mature teratomas – benign – 99% of teratomas
10-15% bilateral MUST represent all 3 germ layers Typically occurs during reproductive years 1) Dermoid cyst variant - This is a mature teratoma but contains ONLY tissues derived from skin. Typically unilocular cyst containing sebum and hair. Only has 1% chance of malignant transformation. If it does it transforms into SQUAMOUS CELL CARCINOMA 2) Monodermal or specialized teratomas. RARE, usually benign and unilateral (Struma Ovarii; Teratoma containing mature thyroid tissue which Can be hyperfunctioning) 3) Immature teratomas – semi malignant - Commonly occurs in children and young adults (avg 18yo) - Gross: Predominantly solid with Necrosis and hemorrhage - Micro: ALL 3 germ layers, Variably immature tissue. Histological grade is Based on proportion of immature neuroectodermal cell. Treatment: Chemotherapy and/or surgery |
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Dysgerminoma
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2% of all ovarian malignancies but 50% of all malignant germ cell neoplasms (Equivalent to testicular seminoma)
Occurs commonly in young adults - Gross: Solid, Nodular, Rubbery - Micro: Primitive cells in nets, sheets with Large nuclei Fibrous stroma with/without lymphocytes - Prognosis: AGGRESSIVE tumor but highly responsive to chemotherapy = >80% 5yr |
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Endodermal sinus tumor - Yolk sac tumor
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UNCOMMON – 2nd most common malignant germ cell tumor. Occurs in Children or young adults
- Micro: Loose stroma. Schiller-Duval bodies (malignant epithelium around vessel - no fibrovascular core). Hyaline droplets. Alpha-fetoprotein (+) Aggressive tumor but responsive to chemotherapy |
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Granulosa-theca cell tumor (and the consequences)
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o 5% of ovarian tumors
o Usually unilateral o Occurs more commonly in older women (2/3 post menopausal) o MOST produce estrogen o Micro: Predominantly Granulosa cells with varying proportion of theca cells Small% of malignant cells 5-25% have multiple recurrences Coffee bean looking nuclei!!! o Clinical consequence: Young girls: Precocious puberty Adult woman: Endometrial hyperplasia Endometrial carcinoma – 10-15% of cases |
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Thecoma fibroma
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o 4% of all ovarian tumors
o 90% are unilateral o Gross: Firm, white to yellow (thecoma) o Micro: Fibroblasts with variable number of spindle cells with lipid droplets (theca cells) o Symptoms: Pain and pelvic mass o Associations: Ascites – 40% of cases >6cm mass Meigs syndrome = ovarian tumor + ascites + right sided hydrothorax! Basal cell nevus syndrome |
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Sertoli-Leydig cell tumor
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o Produce testosterone
o Causes masculinization or defeminization o Occurs in 2nd/3rd decade of life o Unilateral o Gross: Resemble granulosa-theca tumors o Micro: Cells arrange like seminal vesicles without the presence of sperm |
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Congenital cryptorchidism
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Present in approximately 1% of 1-year-old boys,
cryptorchidism is the incomplete descent or maldescent of the intra-abdominal testes. Usually an isolated anomaly, cryptorchidism can rarely be found in combination with other abnormalities of the GU tract, such as hypospadias. It is usually unilateral, although 25% of cases are bilateral. Testicular descent is controlled by hormonal factors, such as mullerian-inhibiting substance and androgens, although the precise cause of cryptorchidism is poorly understood. The condition leads to arrest of spermatogenesis and progressive parenchymal atrophy. Clinical complications include increased risk of traumatic injury and hernia (due to abnormal location in the inguinal canal), sterility if both testes are involved, and 5 to 10 fold increased risk of germ cell tumors (the cause for this association is unknown). The treatment is a surgical procedure which places the testis into the scrotal sac (orchiopexy), although this procedure does not guarantee normal fertility. |
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Germ cell tumor (male) facts
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Over 95% of testicular tumors are of germ cell origin. In general, germ cell tumors affect young
males, with increased incidence in North America and Northern Europe, where they are the most common cancer in men between ages 15 and 44. Approximately 90% of germ cell tumors are associated with isochromosome of short arm of chromosome 12. These neoplasms are classically divided into seminomatous, including seminoma and spermatocytic seminoma, and nonseminomatous germ cell tumors (NSGCT), including embryonal carcinoma, yolk sac tumor, choriocarcinoma and teratoma. This distinction is clinically important for several reasons. NSGCT usually affects younger males, in the 2nd to 3rd decades, while seminomatous tumors tend to occur later. Seminomatous tumors generally metastasize through lymphatics, which NSGCT often spread through hematogenous and lymphatic routes. Finally, seminomas are exquisitely radiosensitive tumors, while NSGCT are usually treated with chemotherapy following surgery. |
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Seminoma
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Gross pathology
Diffuse enlargement of the testes due to a grey, cream or pale pink homogenous lobulated mass. The tumor has a well-defined border. Hemorrhage and cyst formation is rare. Occasionally, the tumor is composed of multiple identicalappearing nodules. Microscopic pathology The tumor is composed of a uniform population of seminoma cells, usually arranged in sheets or clusters, separated by fibrous bands which contain lymphocytes. Tumor cells have clear to pale cytoplasm due to high glycogen content, large centrally placed nuclei with prominent nucleoli and well-defined cell borders. Seminomas show diffuse immunohistochemical staining for placental alkaline phosphatase (PLAP) and C-kit (CD117) in 85-100% of cases. Clinical features Peak incidence is in the 4 th decade. Most patients (70%) present with localized disease (Stage I). When it does metastasize, the tumor goes through lymphatics to lymph nodes. Seminoma has a characteristic sonographic appearance, well-defined and hyperechoic. The tumor has a relatively good prognosis, due to high radiosensitivity. |
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Spermatocytic seminoma
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Gross pathology
The tumor mass is usually soft, well circumscribed, with a bulging mucoid cut surface. It may be lobulated, cystic hemorrhagic or focally necrotic. Microscopic pathology Non-cohesive tumor cells are present in a scant or edematous stroma. In contrast to classic seminoma, lymphocytic infiltrates are rare. The tumor is composed of three different cell types, with marked variability in cell size. Immunohistochemical markers useful in classic seminoma and other GCT’s are usually negative. Clinical features Most tumors occur in older males, with peak incidence in the 7 th decade. There is no ovarian counterpart. Spermatocytic seminoma rarely metastasizes and has an excellent prognosis. |
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Embryonal carcinoma
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Gross pathology
The tumor causes slight or moderate testicular enlargement. The neoplasm is soft and granular, grey, white or pink-tan, often with hemorrhage and/or necrosis. It bulges from the cut surface, and is not well demarcated from the surrounding testicular tissue. Microscopic pathology The growth pattern is varied, with solid, papillary and cleft-like spaces suggestive of primitive gland formation. Tumor cells are large, with abundant clear to basophilic cytoplasm and large, irregular nuclei with prominent nucleoli and frequent mitotic figures. Cell borders are indistinct. Vascular and lymphatic space invasion are common. This tumor usually stains for CD30, is negative for PLAP, and shows only rare, focal cells positive for alpha fetoprotein (AFP) and human chorionic gonadotrophin (HCG). The lack of differentiation reflects the relatively primitive nature of this neoplasm. Clinical features Embryonal carcinoma first occurs at puberty, with peak incidence at 30 years of age. This tumor tends to grow faster than seminoma, and patients may present with testicular pain or from consequences of metastatic spread. Only 2-10% of tumors are “pure” embryonal carcinoma, which portends a worse prognosis than mixed germ cell tumor. |
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yolk sac tumor (male)
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Gross pathology
This tumor is generally non-encapsulated, and presents as a soft, pale gray gelatinous or mucoid mass. Large tumors show hemorrhage and/or necrosis Microscopic pathology Characteristic patterns include a reticular or lace-like arrangement of cells, papillary structures, solid cords, or cyst formation. Structures known as SchillerDuval bodies may be present, which are composed of a central capillary lined on the surface by cuboidal tumor cells. Tumor cells are generally small to medium size, round to cuboidal, and often contain eosinophilic HYALIN GLOBULES within the cell cytoplasm. (These globules stain for alpha fetoprotein (AFP) and α1- antitrypsin.) AFP positivity and the presence of Schiller-Duval bodies are keys to diagnosis. Clinical features This tumor commonly presents as an asymptomatic scrotal mass in young children, with median age 16-17 months, and has a good prognosis in this age group. 90% of patients have elevated serum AFP levels. Pure yolk sac tumor in adults is rare (mixed). |
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choriocarcinoma male
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Gross pathology
Choriocarcinoma usually presents as a hemorrhagic nodule, with a surrounding rim of tan or fibrous tissue. In some cases, there is marked regression of the tumor with only a small fibrous scar. Microscopic pathology The tumor is a mixture of malignant syncytiotrophoblastic, cytotrophoblastic and intermediate trophoblastic cells. Cells arepleomorphic with abundant eosinophilic cytoplasm, and appear highly malignant. Hemorrhage and necrosis are common, as is blood vessel invasion. The tumor is positive for HCG Clinical features Pure choriocarcinoma is rare (<1% of GCT’s), although choriocarcinoma is a component of mixed GCT in 8% of cases. The median age for diagnosis is between 25 and 30 years. The tumor is identical to that arising from the female placenta or ovary, and can also arise from sequestered rests of pluripotent cells in the mediastinum and abdomen!! Although the prognosis for uterine choriocarcinoma is good, testicular choriocarcinoma is an aggressive, highly malignant neoplasm. Patients have high levels of circulating beta HCG, which can be helpful in making the diagnosis. Testicular choriocarcinoma metastasizes early, with lymphatic spread to retroperitoneal lymph nodes and hematogenous spread to lungs, liver, GI tract, spleen, brain and adrenal glands. Hemorrhage of multiple visceral sites is termed “choriocarcinoma syndrome.” Patients tend to present with advanced stage disease. Because the neoplasm does not respond well to radiation and chemotherapy, the prognosis is poor. |
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leydig cell tumor
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Gross pathology
These lesions are usually well circumscribed, often encapsulated, and are usually small (between 3-5 cm). The cut surface is homogenous, yellow to mahogany brown, sometimes with hyalinization or calcification. Microscopic pathology The tumor cells resemble normal Leydig cells, and are medium to large polygonal cells with abundant eosinophilic cytoplasm and distinct cell borders. Nuclei are round to oval with prominent nucleoli. Some cytologic atypia may occur, although mitoses are rare. Intracytoplasmic eosinophilic crystals (Reinke crystals) may be present. Leydig cell tumors stain diffusely for vimentin, inhibin and various steroid hormones. Clinical features Leydig tumors are seen in children between 3 and 9 years, but are most common in adults between the 3rd and 6th decades. Painless testicular enlargement is the most common presenting symptom. As the tumor can elaborate significant amounts of sex steroids, including androgens and estrogens, gynecomastia may occur and children may present with precocious puberty. Approximately 10% of Leydig cell tumors may have malignant features. |
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sertoli cell tumor
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Gross pathology
These tumors are tan yellow to gray white, lobulated, well circumscribed masses. Focal hemorrhage may be present, but necrosis is generally not seen. Microscopic pathology The tumor cells resemble normal Sertoli cells, with oval, round or elongated nuclei and pale cytoplasm. Cells are usually bland and uniform, with rare mitoses. The tumor cells tend to be arranged in characteristic trabeculae, often forming tubules surrounded by a basement membrane. Similar to Leydig cell tumors, Sertoli cell tumors are positive for vimentin, and demonstrate variable positivity for inhibin (40%). Clinical features occur in adults (median age 45 years). Most are benign, although 10% demonstrate malignant behavior. These neoplasms also elaborate sex steroids, but in insufficient amounts to cause clinical effects. |
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gonadoblastoma
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This is a rare neoplasm comprised of both stromal and germ cell components.
Gonadoblastoma is almost always associated with aberrations of sex chromosomes, most commonly mixed gonadal dysgenesis (commonly 45, X / 46, XY mosaicism). The estimated risk of developing gonadoblastoma in this setting is 15-25%. In half of patients with gonadoblastoma, the germ cell component will undergo malignant transformation to seminoma. |
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testicular lymphoma
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Gross pathology
Lymphoma usually involves the testes as a homogeneous tan fleshy mass, often with poor distinction from surrounding testicular tissue. Microscopic pathology The tumor cells generally replace the testicular architecture in a diffuse pattern. Testicular lymphomas are almost always diffuse large B cell lymphomas, with histologic appearance similar to that seen in lymph nodes and other sites. The malignant cells are dyshesive, with moderate amounts of pale eosinophilic cytoplasm, enlarged nuclei and vesicular to coarse nuclear chromatin. By immunohistochemistry, the tumor is diffusely positive for leukocyte common antigen (CD45) and B cell markers CD20 and CD19. Clinical features Lymphoma represents 5% of testicular tumors, and is the most common neoplasm of the testes in men over age 60. Testicular lymphoma may be the primary manifestation of malignant lymphoma (primary testicular lymphoma), or it may occur during the clinical course of a patient with established lymphoma (secondary involvement of testis). 80-90% of primary testicular lymphoma is of the diffuse large B-cell type. Patients with primary testicular lymphoma are treated aggressively with chemotherapy and irradiation, although most demonstrate widespread dissemination within 2 years. Although prognosis depends somewhat on the histologic type of lymphoma and stage of disease, prognosis is generally poor |
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Hydrocele, hematocele, other celes
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Hydrocele is a pathologic collection of serous fluid around the testicle, secreted by the tunica vaginalis. Hydrocele is relatively common and
may occur in older children, adolescents and adults due to trauma, hernia,orchitis or testicular neoplasm. Hydrocele in newborns (10-20 per 1000 live births) is due to abnormal patency of the process vaginalis, in which the space surrounding the testis communicates with the peritoneal cavity. If the lumen of the patent process vaginalis is large enough, the hydrocele may be accompanied by hernia (protrusion of intestine into the scrotal sac). Transillumination (shining a strong light through the enlarged scrotum) is a simple test that can distinguish between a translucent hydrocele and a solid testicular mass. Treatment of hydrocele includes surgical drainage of fluid with resection of the redundant sac tissue, with repair of the process vaginalis in newborns. Additional pathologic fluid collections surrounding the testis include spermatocele, hamatocele and chylocele. Spermatocele is a collection of serous fluid and sperm, which may develop from dilation of the epididymal tubule. Hematocele is a collection of blood, usually due to trauma, torsion or bleeding diathesis. Chylocele is the accumulation of lymph in the setting of lymphatic obstruction. Varicocele and vasitis nodosa are diseases of the spermatic cord. Varicocele arises from varicose dilatation of the veins of the spermatic cord. Vasitis nodosa is a benign reactive condition of the vas deferens, usually occurring after vasectomy, associated with the formation of suture granulomas or sperm granulomas. |
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Arch 1 (CN, M, B, A, P)
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CN - 5
M - masseter B - malleus, incus, mandible A - maxillary P - auditory tube |
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Arch 2 (CN, M, B, A, P)
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CN - 7
M - stapedius, stylohyoid B - stapes, styloid process, lesser hyoid A - stapedius, hyoid artery P - palatine tonsils |
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Arch 3 (CN, M, B, A, P)
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CN - 9
M - stylopharyngeal B - greater hyoid A - common and interal carotid P - parathyroid, thymus |
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Arch 4 (CN, M, B, A, P)
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CN - 10 - superior laryngeal
M - pharynx, larynx B - laryngeal cartilages A - R. subclavian and arch of the aorta P - parathyoid, c cells |
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Arch 6 (CN, M, B, A, P)
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CN - 10, recurrent laryngeal
M - none B - none A - pulmonary, ductus arteriosis P - none |
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histo of genital duct (tubuli recti, rete testeis, epididymis, dd, sv, ej)
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seminiferous tubules - basal compt and adlumnial compt. the outer wall of sem tubule is composed of three to five layers of modified contractile fibroblasts called myoid cells.
tubuli recti - simple columnar or cuboidal epithelium rete testis - simple cuboidal epithelium w/ a single cilium and a few short microvilli (the ciliated cells move the tubule fluid and nonmotile spermatozoa towards epididymis) Epididymis - pseudostratified columnar epithelium, smooth muscle (inc from 1 to 3 layers distally). Principal cells have a long microvilli called stereocilia on lumnial surface (secretory and absorptive activity) + basal cells (prob stem cells). BONUS - sperm spend 2 weeks here in order to later develop motility (thats when they encounter seminal vesicle ercretions) DD - internal mucosa of pseudostratified columnar with stereocilia, thick muscularis, external adventitia. Seminal vesicle - highly folded mucosa (honeycomb) of psuedostratified cuboidal to columnar epithelium with short rounded basal cells. Muscularis and adventitia. Makes fructose, fibrinogen Ejaculatory duct - no muscular bc it is in the fibromuscular stroma of prostate |
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Physiologic targets of estrogen
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Cardio - heart, vascular endothelium
Nervous system - hippocampus, medial preoptic aea, hypothalamus GI - esophagus, salivary glands, intestinal epithelial cells Misc - bronchial smooth muscle, osteoblasts, peiodontal ligament, renal cortex and medulla, liver, pancreatic beta cell Reflect differences in pre and post menopausal women in heart disease, osteoporosis, colon cancer, neurodegenerative disease, allergy and autoimmune disease |
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Examples of age-dependent vs. age-associated disease
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Dependent - invariably gonna happen
- cataracts - hearing loss - osteoporosis -osteoarthritis - nodular prostatic hyperplasia - senile hyperinflation of lungs Assoc. - systemic atherosclerosis - temporal arteritis - myeldodysplastic syndrome - htn - dm 2 - vulnerability to infections - alzheimer disaes - many cancers - glaucoma |
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Individual, organ, cellular changes with aging
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Individual - theme is loss of function, diminished ability to respond to stress. Examples: decreased BMR, std cell water, GFR, max breathing capacity, conduction velocity. Fat goes up, muscle goes down
Organs - atrophy Cell: decreased oxidative phosphorylation, dec DNA, RNA synth, dec capacity to take up nutrients. Accumulation of age-related products: lipofuscion (lipid oxidation), amyloid deposits in the heart, AGE products (for ex, leading to decreased skin elasticity, senile catacts, diabetes changes) |
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Human progeroid syndromes (name, gene, lifespan, features)
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1) Hutchinson-gilford, Nuclear Lamin A/C, abt 25 years. Features: skin atrophy, loss of subq fat, hair loss, arteriosclerosis, bone loss
2) Werner, WRN (helicase), abt 60 yrs. Features: skin atrophy, CATARACTS, MILD DM, OSTEOPOROSIS, ALOPECIA, atherosclerosis, cancer predispistion, HYPOGONADISM 3) Cockayne, Type A, CKN1 (WD repeat protein), abt 40 yrs. Features: NEURODEGENERATION, CATARACTS, skin photosensitivity, hypogonadism 4) Cockayne Type B, ERCC6 (helicase) 5) Ataxia telangiectasia, ATM (kinase which senses dna damage), abt 45 years. Features: CEREBELLAR DYSfunction, sensitivity to ionizing radiation, cancer predisposition, hypogonadism |
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Effect of bedrest on MSK, CVS, Pulm, Skin system
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1) MSK falls, fractures, weakness, dependency
• ~1% Loss of strength per day • Muscle atrophy • Further reductions in aerobic capacity • Impaired joint range of motion • Development of contractures • Accelerated bone loss 2) CVS - dehydration, orthostasis/falls, delirium Further reductions in plasma volume • Further diminished baroreceptor sensitivity • Enhanced venous compliance (lower extremities) • Increased resting heart rate 3) PULM - penumonia, MI, delirium • Further reductions in ribcage expansion • Impaired ventilation • Enhanced V/Q mismatch • Further reduction in p02 by ~8mmHg • Further impaired cough 4) Skin - pressure sores, sepsis, pain, immobility - Exposure to prolonged pressure, shear, friction and moisture 5) Renal/hormonal reg of water/electrolyte balance • High risk for dehydration • High risk for hyponatremia • Prescribing errors due to dosing by serum Creatinine, and not by estimating CrCl as a measure of GFR |
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Physiology of elders that predispose them to problems from bedrest
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MSK:
• Reduced muscle mass and strength • Impaired aerobic capacity • Diminished cartilage strength • Diminished tendon flexibility • Reduced bone density CVS: • Impaired thirst • Impaired baroreceptor sensitivity • Decreased plasma volume • Decreased total body water • Impaired LV compliance • Decreased maximum heart rate. • Reduced cardiac output with exercise Pulm • Reduced ribcage expansion • Diminished lung elasticity and recoil • Reduced alveolar surface area • Reduce hypoxic drive • Drop in PaO2 • Reduced function and number of cilia • Impaired cough • Increased A-a gradient - Reduced forced vital capacity Skin: • Thinner epidermis and dermis • Reduced vascular supply • Reduced subcutaneous fat • Reduced cellular turnover • Reduced moisture content Renal/Hormonal: • Loss of glomerular and tubular mass • Creatinine production falls at nearly the same rate as the renal clearance of creatinine, and a normal serum creatinine often represents a decline in kidney function • Increased ANH (atrial natriuretic hormone) secretion • Reduced aldosterone levels • Normal to elevated basal ADH (antidiuretic hormone) secretion, and decreased renal responsiveness to ADH • Predisposition to volume depletion and free water excess* |
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Cellular aging
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• Cell-autonomous defects: delayed or blunted reaction to stimulation
(reduced signaling, transcription, etc.); proliferative decline, altered function, cellular re-programming • Population changes: decline in new cell production, reduced removal of cells by apoptosis, expansion of some cell clones at the expense of others, defects in homeostasis • Changes in the microenvironment – stromal aging, extracellular matrix alterations, accumulation of inflammatory mediators, dysregulated cytokines , etc. |
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Trisomy 18 vs. 13
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18 -
1) Small, mentally retarded, failure to thrive 2) short sternum, small pelvis, rocker bottom feet 3) cardiac, renal, intestinal defects 4) Death in less than a year 13- 1) microcephaly and abnormal brain developement (like holoprosencephaly) 2) cleft lip and palate, polydactyly 3) cardiac dextroposition, septal defect |