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1023 Cards in this Set

  • Front
  • Back
Breast enlargement during pregnancy is an example of
Hyperplasia
What about skeletal muscle enlargement from weight lifting
Hypertrophy
Atrophy is often marked by the presence of
Autophagic granules
Metaplasia (eg squamous metaplasia of the bronchi from long-term smoking) is often associated with
Chronic irritation
Metaplasia can also be associated with
Vitamin A deficiency
Myeloid metaplasia is aka
Extramedullary hematopoiesis
____ is the most common cause of hypoxic cell injury
Ischemia (obstruction of arterial blood flow)
Describe the sequence of early stage hypoxic cell injury
Mitochondria effected, decreased ATP production, failure of Na-K-ATPase pump, retained Na+ causes swelling of ER, diasaggregation of ribosomes and ↓protein synthesis, ↑glycolysis and ↑lactate
Name two markers of late-stage cell hypoxia
Myelin figures and cell blebs
What signifies the point of no return in cell damage
Calcium influx, calcification of the mitochondria
How long can neurons, muscle cells, cardiac cells and hepatocytes last without oxygen
N 3-5 minutes (Purkinjes in cerebellum and neurons of the hippocampus most sensitive)
Name two common conditions where oxygen toxicity is due to free radical damage
Retrolental fibroplasia – retinopathy of preemies
Name the classic ultrastructure markers of barbiturate poisoning
Proliferation and hypertrophy of the SER of the hepatocyte
Reperfusion following _____ injury is also a major cause of free radical injury
Ischemic
Name the intracellular enzymes involved in free radical degradation
Glutathione peroxidase, catalase, and superoxide dismutase
Which vitamins are significant anti-oxidants
Vit A, C and E
Chemical cellular injury is modeled by _____
Hepatocyte injury due to CCl4
Briefly discuss this model:
CCl4 is processed by P-450 enzymes in the SER, this produc s CCL3-, which initiates lipid peroxidation of intracellular membranes, dissagre-gation of ribosomes, ↓protein synthesis including lipoproteins, thus fatty change occurs
Ultimately, the _____ membrane is damaged due to the lipid perox. of SER, this results in
Massive calcium influx with resultant mitochondria damage and cell death
Necrosis only occurs within
Living organisms
______ necrosis most often occurs from a sudden cutoff of blood supply to an organ, particularly end-organs like the heart and kidney
Coagulative
Pathological changes involved?
General architecture well preserved, except for nuclear changes
_____ is chromatin clumping w/↑basophilia
Pyknosis
_____ is fragmentation of DNA
Karyorrhexis
_____ is the fading of chromatin material
Karyolysis
Enzymatic liquefaction of necrotic tissue, most often in the ____ is aka liquefactice necrosis
Where else does liquefactive necrosis occur
In bacterial infections
_____ necrosis shares features of both coag. And liquefactive necrosis. Most commonly seen in TB granulomas
Caseous
Which necrosis results from interruption of blood supply to a lower extremity or bowel
Gangrenous
When is it called WET gangrene
When it is complicated by infective heterolysis and consequent liquefactive necrosis
Fibrinoid necrosis is marked by
Deposition of fibrin-like proteinaceous material in arterial walls
It is often associated with
Immune mediated vascular damage (vasculitis)
Fat necrosis occurs in what two forms
Traumatic fat necrosis
Traumatic follows severe injury to tissue with high fat content, whereas enzymatic is a complication of
Acute hemmorrhagic pancreatitis, where proteolytic and lipolytic enzymes seep into pancreatic parenchyma and digest it, which liberates fatty acids that are then saponified
Which has an inflammatory rxn?
Fatty change (aka _____) is characterized by
Steatosis, accumulation of intracellular parenchymal TGs.
Most frequently observed in which organs?
Liver, heart and kidney
_____ change describes a homogenous, glassy eosinophilic appearance
Hyaline
Argyria is aka _____
Silver poisoning, may cause a permanent gray discoloration of the skin and conjunctivae
Decreased melanin pigmentation is seen in what two conditions
Albinism and vitiligo
Bilirubin is a catabolic product of both _____ and _____
Hemoglobin and methemoglobin
What is hemosiderin?
Iron containing pigment that consists of aggregates of ferritin
Stains best with _____
Prussian blue
Systemic hemosiderosis is hemosiderin deposition without without _____
Tissue or organ damage
May result from?
Hemorrhage, blood transfusions, hemolysis, excessive dietary iron
How is hemoCHROMATOSIS different
Damage to many tissues and organs, scarring and organ dysfunction
Manifests itself as?
Hepatic cirrhosis and pancreatic fibrosis, leading to diabetes mellitus
Most often caused by
Hereditary disorder characterized by ↑iron absorption
Caused by a mutation in which gene?
Hfe gene on chromosome 6
Organs most affected?
Liver pancreas and myocardium
Triad of findings?
Micronodular cirrhosis, diabetes mellitus and skin pigmentation (bronze diabetes)
Which pts are at greatest risk for secondary hemochromatosis following transfusion
Those with beta-thalassemia
_____ is a yellowish, fat soluble pigment and the end product of lipid peroxidation
Lipofuscin
Combination of lipofuscin and organ atrophy is aka
Brown Atrophy
Metastatic calcification is caused by
Hypercalcemia
Often the result of
HyperPTH, osteolytic tumors, hypervitaminosis D
What is dystrophic calcification
Calcification in areas of previously damaged tissue, such as areas of old trauma, TB lesions, scarred heart valves and atherosclerotic lesions
Which chaperone protein marks abnormal proteins for degradation
Ubiquitin
Abnormal protein aggregation is characteristic of which diseases
Amyloidosis, Alzheimers, Prion diseases and Huntington’s
Inflammation
Name the five cardinal signs
Red, pain, heat, swelling, LOF
Name the three families of adhesion molecules
Selectins, integrins, Ig-family adhesion proteins
_____ are induced by IL-1 and TNF
Selectins
L-selectins are expressed on _____ and bind to endothelial cells
Neutrophils
E and P selectins are expressed on _____ cells and bind to leukocytes
Endothelial
Which selectins are stored inside endothelial cells and are brought to the surface only after stimulation by histamine and/or thrombin
P-selectins
______ are expressed on endothelial cells and bind to integrin molecules on leukocytes
ICAM-1 and ICAM-2
Give an example of the integrins expressed on leukocytes
LFA-1
____ are the most prominent inflammatory cells in the first 24 hrs
Neutrophils
Name two important causes of neutrophilia
Bacterial infection
After 2-3 days, PMNs are replaced by
Monocytes/macrophages
Name some important causes of monocytosis (i.e. increased # of monocytes in peripheral blood)
TB, brucellosis, typhus, salmonella infection
Which are the most prominent inflammatory cells in viral infections
Lymphocytes (also most prominent in chronic inflammation)
Eosinophils are most prominent in
Allergic RXNs and parasite infections
Which cells are sources of histamine
Mast cells and basophils
Important causes of basophilia include
CML and other myeloproliferative diseases
Margination
Leukocytes localize to the outer margin of the blood flow
Pavementing
Occurs as leukocytes line the endothelial surface
Rolling (tumbling) is mediated by
Endothelial selectins loosely binding to leukocytes
Adhesion of leukos to endothelial surface is mediated by
Integrins on leukos binding to Ig-family adhesion proteins on endothelium
Transmigration across the endothelium is mediated by
PECAM-1
Chemotaxis?
Process by which leukos are attracted and move towards an injury
Movement occurs along a
Chemical gradient
Name the most prominent chemotactic factors
Complement components, esp. C5a
Define opsonization
The coating of particulates by opsonins, which immobilize the particles on the macrophage surface
Name the most important opsonins
IgG subtypes
Which portion of the IgG molecule binds to the phagocytic cells
Fc
What is the most important intracellular microbicidal killing method
Oxygen dependent microbe killing
Phagocytosis initiates activity of the _____ shunt, causing an oxidative burst, which supplies electrons to NADPH oxidase in the phagosomal membrane
Hexose monophosphate
One of the products of the oxidase is ____, which is further converted to _____ by dismutation, which is further mutated to _____
Superoxide ion, hydrogen peroxide, hydroxyl radical
What does the hyd. Peroxide do for us?
In the presence of myeloperoxidase and a halide ion, it oxidizes microbial proteins and disrupts cell walls
Exogenous mediators of acute inflammation are most often _____ and are exemplified by _____
Of microbial origin, formylated peptides of E.coli
Endogenously, _____ from mast cells, basophils and platelets ↑capillary permeability
Histamine
Binding of what substances to basophils/mast cells causes this acute inflammation
IgE, C3a / C5a (anaphylatoxins), and IL-1
The AA pathway yields ____ in platelets and _____ in endothelial cells
TxA2, PGI2 (prostacyclin)
Function of platelet TxA2
Powerful vasoconstrictor and platelet aggregant
Function of endothelial PGI2
Powerful vasodilator and inhibitor of platelet aggregation
Function of the leukotrienes released via the lipoxygenase pathway of AA metabolism
Chemotactic for PMNs (LTB4)
What are the acute phase responses activated by cytokines
Fever and leukocytosis
The kinin system is activated by
The Hageman factor (XIIa)
Kinin converts prekallikrein to kallikrein which then cleaves HMWK to _____
Which anaphylatoxin activates the lipoxygenase pathway of AA metabolism
C5a
What (who) forms the MAC (membrane attack complex)
C5b-C9
Nitric oxide is produced by
Endothelial cells
Abcesses are cavities filled with pus and are usually the result of
Bacterial infections, esp. S.aureus
Increased susceptibility to infection may be due to deficiency of
Complement components C2,3,5
Describe chronic granulomatous disease of childhood
Usually X-linked
Which organisms are ingested but NOT destroyed
Catalase positive – these guys can destroy the hyd. Peroxide generated by bacterial metabolism, and the PMNs are deficient so they cannot generate additional hyd.peroxide, thus none is available as a substrate for myeloperoxidase system
Examples of CAT(+) and CAT(-) organisms
S.aureus – CAT(+)
What type of inheritance is Chediak-Higashi
Autosomal recessive
Marked by the presence of abnormal
WBCs
The WBCs have impaired
Chemotaxis and migration (microtubules)
How do they look morphologically
Large cytoplasmic granules (representing abnormal lysosomes)
What are the two major patterns of chronic inflammation
Chronic nonspecific and granulomatous inflammation
Granulomas are nodular collections of specialized macrophages referred to as_____ and are usually surrounded by a rim of _____
Epitheliod cells
Here’s the process: macrophages present antigen to _____, which in turn secrete _____ that mediate the macrophage conversion to epitheliod cells and giant cells
CD4+
Granulomas are often characterized by _____ necrosis
Caseous
However, non-caseating granulomatous disease is most often caused by _____
Sarcoidosis (think young, black female)
Which giant cells also characterize granulomas
Langhans giant cell
What is unique about the nuclei of these cells
Horseshoe nucleus
What infectious agents are classic for granulomas:
TB, leprosy, Blasto, Histo, Coccidio, Syphillus, Cat Scratch disease.
____ cells divide actively throughout life and are capable of regeneration after injury
Labile
____ cells generally undergo very few divisions but can regenerate from G-0 cells when needed. They are also capable of regenerating post-injury.
Stable
Examples?
Liver and kidney cells
What is the third class of cells and examples
Permanent: neurons and myocardial cells
Promotes new vessel formation?
_____ tissue is highly vascular, newly formed connective tissue consisting of capillaries and fibroblasts
Granulation
_____ is produced by fibroblasts
Collagen
Why does diabetes delay or impede tissue repair
↑susceptibility to infection and ↓circulation
Why does deficiency of ascorbic acid / protein also delay tissue repair
Both are required for collagen formation
Hemodynamic Dysfunction
Difference between ecchymosis and hematoma
Diffuse vs. local hemorrhage
Chronic passive congestion of the liver and lower extremities is most often cuased by
RHF
This results in nutmeg liver, explain:
Produced by a combination of dilated, congested central veins and the surrounding brownish-yellow (often fatty) liver cells
_____ is necrosis resulting from ischemia
Infarction
White or pale infarcts are usually caused by
Arterial occlusions in the heart, spleen or kidney
Red infarcts are
Hemorrhagic infarcts in which red cells ooze into the necrotic area
Red infarcts characteristically occur in
Lung and GI tract (i.e. areas w/redundant supplies)
What causes platelet adhesion in thrombogenesis
Exposed (damaged) endothelial collagen
This platelet surface glycoprotein receptor and subendothelial collagen interaction is mediated by
vWF
Describe the release reaction
Soon after adhesion, platelets release ADP, histamine, PDGF etc
Activation of platelet membrane phospholipase leads to what
AA pathways, thus TxA2 (recall: potent vasoconstrictor and platelet aggregant
Why don’t we become one giant clot?
PGI2 is also produced by endothelial cells and is an antagonist to platelet TxA2
Endothelial cells are somewhat against clotting, what substances do they secrete
Proteoglycans that activate AT-III
What does (APC) activated protein C do?
Cleaves factors Va and VIIIa
What co-factor for APC do endothelial cells synth?
Protein-S
Extrinsic pathway of coagulation:
Factor VII / Tissue Factor, Factor X/Xa etc
Factor Xa and Va activate
Prothrombin to thrombin
Which, in turn, activates
Fibrinogen to fibrin
What’s important about XIIa
XII-to-XIIa activation links the fibrinolytic system, coagulation system, complement system and kinin system
Hereditary thrombophilia is common in
Adolescents and young women
Characterized by
Recurrent venous thrombosis/thromboembolism
Can be caused by deficiency in
AT-III, protein C and/or protein S
But, what is the most common cause?
Factor-V Leiden – abnormal factor-V with a specific mutation that alters the cleavage site targeted by APC
This condition is aka
Hereditary resistance to APC
Name two more causes
Prothrombin 20210A transition
Which antiphospholipid antibody associated with SLE can cause a false(+) syphilis test
Anti-cardiolipin antibody
Mature arterial thrombi with alternating dark gray layers of platelets interspersed with lighter layers of fribrin are aka
Lines of Zahn
In contrast, venous clots are what color
Deep red
What is the most frequent form of embolism
Thrombo-embolism
Which type of pulmonary emboli produce sudden death
Saddle emboli
How do pulmonary hemorrhagic infarcts appear
Wedge shaped and located just below the pleura
Where do most arterial emboli develop
Mural thrombi in the heart
Mural thrombi in the left atrium esp/ assoc with
Mitral stenosis w/atrial fibrillation
Whereas, mural thrombi in the left ventricle are most often assoc. w/
MI
Most frequently, which cerebral artery is embolized
Middle cerebral artery
What are paradoxical emboli
Originate in venous system, but become left sided emboli
How can this happen
Patent foramen ovale or atrial-septal defect
What to watch out for in a pt with many fractures following trauma
Fat embolism syndrome
LHF results in
Edema can also be caused by ↓oncotic pressure. Name two causes for this:
Nephrotic syndrome – loss of protein, thus hypoalbuminemia
_____ aka generalized edema
Anasarca
Transudate has a low ____ content and SG<?
Protein, 1.012
Exudate results from
↑vascular permeability as a result of inflammation
Exudate has a high ____ content and SG>? And characteristically contains large numbers of
Protein, 1.020, inflammatory leukocytes
Cardiogenic shock is most often caused by
LHF due to MI
Septic shock most often characterized by what type of infections
Gram negative
What causes the cascade of cytokines that leads to direct vascular injury
Lipopolysaccharide (LPS) from outer membrane of gram negative bacteria
What toxic molecules are responsible for toxic shock syndrome
Superantigens, most often assoc. w/S.aureus
What is the most important anatomical finding in shock
Acute tubular necrosis
Name some others
Patchy mucosal hemorrhage in the colon
First Aid Path Start
Pt has multiple fractures, anemia, and CN deficits, what cells are dysfunctional
Osteoclasts (osteopetrosis)
High blood pressure in arms, low BP in legs
Coarctation of aorta
Pt presents with diffuse goiter and hyperthyroidism, what are the expected TSH and thyroid hormone levels
Low TSH, high thyroid hormone levels
Obese woman presents with hirsutism and ↑ levels of serum testosterone, what is the DX
Polycystic ovarian syndrome
Pt with elevated cortisol, 1 mg DEX test does not ↓cortisol, 8 mg does, what is the DX
Pituitary tumor
Child has been anemic since birth, splenectomy would result in ↑hematocrit in which disease
Spherocytosis
DX: dizziness, tinnitus, enlarged internal acoustic meatus
Schwannoma
DX: child with weakness and enlarged calves
Duchenne’s muscular dystrophy
How is it inherited
X-linked recessive
25 y/o female, sudden uniocular vision loss, HX of parasthesias and weakness that have resolved
MS
Teenager presents with nephritic syndrome and hearing loss, DX:
Alport’s syndrome
Female has recurrent URIs and inability to conceive, she has dextrocardia, which protein is defective
Dynein (Kartagener’s)
55 y/o man, heavy drinker and smoker, flu-like symptoms, no organisms on Gram stain, silver stain of sputum shows Gram(-) rods?
Legionella pneumonia
50 y/o man with diarrhea, his face is plethoric and a heart murmur is detected, DX:
Carcinoid syndrome
Elderly woman present with headache and jaw pain, labs show ↑ESR, DX:
Temporal arteritis
Woman at 16 weeks gestation, but has abnormally large abdomen, what could be the cause? What blood test will help with the DX?
Hydatidiform mole
Most likely cause of systolic crescendo-decrescendo murmur
Aortic stenosis
Woman of short stature with shortened 4th and 5th metacarpals, what endocrine disorder?
Albright’s hereditary osteodystrophy, or pseudohyoparathyroidism
30 y/o man with BRBPR after stressful event. Colonic biopsy shows transmural inflammation
Crohn’s Disease
Thus, what would be the key to the biopsy on UC
Inflammation through the mucosa/submucosa only
Young man with mental deterioration and tremors, brown ring around cornea: DX and TX
Wilson’s disease
Gross photo of AAA, what is the most likely cause
Atherosclerosis
Photo of bunch-of-grapes hydatidiform mole, high levels of what substance are found
hCG
Photo of focal intestinal hemorrhages in a weightlifter, DX
Strangulation of a hernia
Collapse of middle lobe of right lung, pt has a mass In right bronchus, HX of recurrent pneumonia
Bronchogenic carcinoma
Middle aged female w/syncope, mass removed from right atrium, wispy mucus-like tissue
Myxoma
What are the clinical findings in pneumothorax
Pleuritic pain, SOB
1 y/o baby with red spot on face, it blanches w/pressure, no neurological signs, what is the expected course
Regression
What similar stain has a much more malignant DX
Port-wine stain of Sturge-Weber syndrome
H&E of lung biopsy from a plumber shows dumb-bell shaped stuctures, DX?
Asbestosis
Increased risk for?
Malignant mesothelioma
Multiple mesangial nodules on a glomerulus is indicative of
Diabetes mellitus
Polycystic kidney disease in adult is inherited by
Auto. Dominant
Pt with anemia, hypercalcemia, and bony pain on palpation; bone marrow biopsy shows many plasma cells w/large, round, off-center nucleus
Multiple myeloma
NTDs are asscoiated with ↑levels of
Alpha-feto protein in both amniotic fluid and in mother’s serum
1.
early cyanosis (blue babies)
2.
late cyanosis (blue kids)
1.
R-to-L
2.
L-to-R
What are the three T’s of blue babies
1.
2.
Transposition of great vessels
3.
Truncus arteriosus
Children may squat to ↑
Venous return
What three conditions lead to blue kids
VSD > ASD > PDA
In fact, ___ is the most common congenital anomaly
VSD
Progressive pulmonary HT leads to _____ shunt, aka _____
R-to-L, Eisenmenger’s
Describe Eisenmenger’s syndrome
Uncorrected VSD, ASD or PDA leads to progressive pulm. HT, the shunt changes from L-to-R over to R-to-L, which causes late cyanosis, clubbing and polycythemia
PROVe pneumonic of Tetralogy of Fallot
Pulmonary stenosis
Patients suffer _____ spells
Cyanotic
Cause of the tetralogy?
Anterosuperior displacement of the infundibular septum
Is transposition of the great vessels compatible with life
No, not unless a shunt is present to allow mixing of blood. VSD, PDA or PFO
Which babies are at high risk
Those born to diabetic mothers
In coarctation of aorta, what is the infantile type and adult type
Infantile: stenosis proximal to insertion of ductus arteriosus (preductal)
Gender bias?
Male:female = 3:1
Any associated syndromes
Infantile is assoc. w/Turner’s syndrome
Fetal PDA is a ‘normal’ R-to-L shunt, but perinatal, is the PDA remains, flow switches and RHF results, what type of murmur is heard
What maintains patency
PGE synthesis, Low oxygen tension
Down’ syndrome risk is
1:700
Duodenal _____ is common, as is congenital _____
Atresia, heart disease
1.
which leukemia?
2.
Which neurological deterioration
1.
ALL
2.
ALLzheimer’s
95% of cases are due to
Meiotic non-disjunction (MNDJ) of homologous chromosomes
MNDJ is assoc. with
↑age
Edward’s syndrome is trisomy ____
18 (Election age is 18)
Patau’s syndrome is trisomy ____
13 (Puberty is at 13)
Which is assoc. with midline defects
Patau’s
Which is asoc. with polydactyly
Patau’s
What is one of the most common causes of hypo-gonadism in males
Klinefelter’s
Genotype
XXY
Presence of inactivated X chromosome (aka____)
Barr body
Whereas, in Turner’s syndrome, there is____
No Barr body present, because genotype = XO
Turner’s is most common cause of
Primary amenorrhea
Cardiac anomalies?
Coarctation of the aorta
Double ‘Y’ males (XYY) are phenotypically normal except for
Very tall, severe acne
Define pseudo-hermaphrodite
Disagreement between external genitalia and testes/ovaries (i.e. phenotypic vs. gonadal sex), ambiguous genitalia
Most common form of male pseudo- is
Testicular feminization (androgen insensitivity),
This results from a mutation in
The androgen receptor gene
Define a true hermaphrodite
Both ovary and testicular tissue present
microcephaly, retadation, high pitched crying
X-linked defect affecting the methylation and expression of FMR-1 gene. It is the 2nd most common cause of mental retardation
Fragile X syndrome
____ repeat disorder (CGG)
Triple
Phenotype (appearance)
Enlarged testes, long face, large jaw, autism
What is the MOST common cause of retardation
Downs
1. X-linked recessive, dystrophin gene deletion, onset <5y/o, starts in pelvic girdle, big calves
Why big calves (pseudohypertrophy)
Fatty-fibrous replacement of muscle
Gower’s maneuver
Using arms to stand one’s self up (indicates proximal limb weakness)
How does Becker’s MD differ
Dystrophin gene mutations, NOT deletions, thus not as severe
How is diagnosis made
Muscle biopsy, serum CPK increase
CF is due to
CFTR gene defect (auto. Recessive) on C7
Recurrent pneumonia often due to which organisms
Pseudomonas, S. aureus
How does this manifest itself in newborns
Meconium ileus, failure to thrive
How about in adults (esp. males)
Infertility, vitamin ADEK deficiencies
Autosomal dominant diseases (8)
Adult polycystic kidney disease: 90% of cases due to mutation in
APKD1 gene on C16
Associated conditions
Berry aneurysms, mitral valve prolapse
Isn’t there a juvenile form as well?
Yes – but its recessive
_____: elevated LDL due to defective LDL receptor
Familial hypercholesterolemia
Look for severe _____ early in life
Atherosclerotic disease, cholesterol 300-700
Classic finding is xanthomas on
The Archille’s tendon
Marfan’s is due to
Fibrillin gene mutation
Thus, characterized by
Connective tissue disorders
Long thin skeletons, fingers etc. But, what cardiac anomalies are present
Cystic medial necrosis of aorta, dissecting aortic aneurysms, floppy mitral valve (prolapsing)
Any ocular findings
Sublaxation of lens
_____: café au lait spots, neural tumors, Lisch nodules (pigmented iris hamartomas)
NFT1: von Recklinghausens (chromosome 17 because there are 17 letters in name)
Findings in von Hippel Lindau
Hemangioblastomas of retina / cerebellum / medulla, about 50% get renal carcinomas
Which gene is involved
VHL gene on C3
_____ disease: depression, progressive dementia, chorea
Huntington’s
What transmitters are affected
↓GABA and Ach in the brain
Section of brain most affected
Caudate nucleus
How is this like Fragile X syndrome
Triple repeat disorder
Which chromosome is involved
C4
Name the features of Familial Adenomatous Polyposis
Deletion on chromosome Five
_____ causes hemolytic anemia and splenectomy is curative
Hereditary spherocytosis
How is MCHC affected
Increased
End of autosomal dominant disease
At this point, you should study the lists of auto.recessive and x-linked diseases
Why are female carriers of x-linked diseases rarely affected?
B/c of random inactivation of X chromosomes in each cell.
___ are assoc. W/low folic acid during pregnancy
NTDs
Lab tests?
Raised alpha-fetoprotein
What are the defining features of spina bifida occulta
Failure of boney spinal canal closure
Meningocele?
Meninges alone herniated through spinal canal defect
Meningomyelocele, therefore, is when
Meninges AND spinal cord herniated through
Even though there is no herniation in occulta, what telltale sign is present
Tuft of hair on child’s back
When is the highest risk (during pregnancy) for FAS (fetal alcohol syndrome)
3-8 weeks
What is the number one cause of congenital malformations in the US?
FAS
____ is the abnormal proliferation of cells with loss of size, shape and orientation
Dysplasia
What two conditions define carcinoma-in-situ
1. Malignant cells have not invaded basement membrane
How do malig. Cells breach the basement membrane
Using hydrolases and collagenases
When the BM is breached, this is called
Invasive carcinoma
In the “seed and soil” theory of metastases, the tumor embolus is the seed, what is the soil
The target organ (liver, lungs, bone, brain)
When one adult cell type is replaced by another, we call this
Metaplasia
_____ = abnormal cells lacking differentiation
Anaplasia
_____ = a clonal proliferation of cells that is uncontrolled and excessive
Neoplasia
The histiologic appearance of a tumor is aka
Grade (usually I-IV)
Grading is based on degree of differentiation and number of
Mitoses per HPF
The STAGE is based on
Site and size of primary lesion, spread to LNs, and presence of mets.
Which has more prognostic value
Stage
Describe the TNM staging system
T=size of tumor
5. bone
Down’s
Xeroderma pigmentosum
Squamous cell and BCC of skin
Chronic atrophic gastritis, pernicious anemia
Gastric adenocarcinoma
Tuberous sclerosis (facial angiofibroma, seizures, mental retardation)
Astrocytoma and cardiac rhabdomyoma
Actinic keratosis
SCC of skin
Barret’s
Esophageal adenocarcinoma
Plummer Vinson syndrome
SCC of esophagus
What are the symptoms of PV syndrome
Atrophic glossitis, esophageal webs, anemia
These are all due to
Iron deficiency
Cirrhosis leads to (ETOH, Hep B or C)
Hepatocellular carcinoma
UC leads to
Colonic adenocarcinoma
Paget’s disease of bone
Secondary osteosarcoma and fibrosarcoma
Immunodeficiency states most often lead to
Malignant lymphomas
Autoimmune diseases such as Hashimoto’s and MG can lead to
Malignant thymomas
Acanthosis nigricans (hyperpigmentation and epidermal thickening
Visceral malignancy (stomach, lung, breast, uterus)
Dysplastic nevus leads to
Malignant melanoma
Given an oncogene, name the assoc. tumor:
c-myc
Burkitt’s lymphoma
Bcl-2
Follicular and undifferentiated lymphomas
Erb-B2
Breast, ovarian, gastric carcinomas
Ras
Colon carcinoma
Name the chromosomes the following genes are located on, and the tumor that results with their loss
Rb
13q – retinoblastoma, osteosarcoma
BRCA ½
13q,17q – breast and ovarian cancer
P53
17p – most human cancers
PSA stands for
Prostatic acid phosphatase
Which marker is very non-specific but is produced by 70% of colorectal and pancreatic cancers
CEA (carcinoembryonic antigen)
Which carcinoma elevates alpha-fetoprotein
Hepatic carcinoma
Beta –hCG is a good marker for
Hydatidiform moles, Choriocarcinomas, Gestational trophoblastic tumors
S-100 is a good marker for
Melanoma, neural tumors, and astrocytomas
Alk-phosphatase is elevated in
Paget’s disease of bone
Name the assoc. disease/cancer (given the virus)
HTLV-1
Adult T-call leukemia
HBV,HCV
Hepatocellular carcinoma
EBV
Burkitt’s, nasopharyngeal carcinoma
HPV
Cervical carcinoma (16,18)
HHV-8
Kaposi’s sarcoma
Given a toxin, name the affected organ
Aflatoxin, vinyl chloride
Liver
Nitrosamines
Esophagus, stomach
Asbestos
Lung (mesothelioma, bronchogenic carcinoma)
Arsenic
Skin (SCC)
CCl4
Centrilobar necrosis, fatty change
Prostate adenocarcinoma most often arises from which lobe
Posterior lobe (peripheral zone)
_____ is a presursor to SCC
Actinic keratosis
SCC is assoc. with what exposures
Sunlight and arsenic
Locally invasive but rarely
Metastasize
Histology?
Keratin pearls
What is the histology of BCC
Palisading nuclei
What about the pathognomonic gross appearance
Pearly papules
Any metastases
Almost never
So, who DOES metastasize
Melanoma
____ of tumor correlates with risk of mets
Depth
____ is a precursor
Dysplastic nevus
Common benign bone tumor in men <25y/o
Osteochondroma
Commonly originates from
Long metaphysis
Another common benign bone tumor that occurs at epiphyseal end of long bones, onset between 20-40 y/o. (distal femur, proximal tibia)
Giant cell tumor
Characteristic appearance on xray?
Soap bubble
Most common primary malig. Tumor of bone in men 10-20 y/o.
Osteosarcoma
Location?
Metaphysis of long bones
Any predisposing factors?
Paget’s disease, familial retinoblastoma
Characteristics on xrays?
Codman’s triangle
Another malig. Sarcoma in boys < 15 y/o?
Ewing’s sarcoma
Xray characteristics?
Onion-skin pattern
What type of cells are involved
Anaplastic SMALL cells
Location in bone?
Diaphysis of long bones, pelvis, scapula, ribs
Which translocation?
11;22 translocation
Brain tumors
Adult tumors are mostly located______
Supratentorial (kids are infratentorial)
GBM is most common primary brain tumor. What is its location and PX
Cerebral hemispheres
Histology
Pseudopalisading tumor cells border areas of necrosis and hemorrhage
What’s the second most common
Meningiomas
Locations?
Convexities of hemispheres
Arise from _____ cells
Arachnoid
Histology
Psammoma bodies (whorled pattern)
What rare tumors grow in the frontal lobe and have fried egg appearance
Oligodendrogliomas
Name the third most common tumor
Scwannomas
Often localized to ___ nerve and called
8th, acoustic neuroma
Bilateral schwannomas found in
NF2 syndrome
Which adenoma is derived from Rathke’s pouch
Pituitary
Symptoms
Prolactin increases
Now, for some childhood brain tumors
Highly malignant cerebellar tumor that is a form of primitive neurectodermal tumor (PNET)
Medulloblastoma
Symptoms
Can compress 4th ventricle and cause hydrocephaly
Histiology
Rosette or perivascular perirosette
What other cerebellar tumor is asoc. With von Hippel Lindau syndrome when seen with retinoblastomas
Hemangioblastomas
These tumors can produce ____ leading to ____
EPO, polycythemia
Which tumors are found most often in the 4th ventricle
Ependyomas
Which tumor are most often found in the posterior fossa
Low-grade astrocytomas
Childhood tumor derived from Rathke’s pouch that mimics pituitary adenoma b/c it can also cause bilateral hemianopia
Craniopharyngioma
_____ is common, which helps with radiologic DX
Calcification
Lots of Bad Stuff Kills Glia
Lung
What are the most common sites of mets (after LNs)
Liver and Lung
Cancer Sometimes Penetrates Benign Liver
Colon>Stomach>Pancreas>Breast>Lung
BLT with a Kosher Pickle
Breast, Lung, Thyroid, Testes, Kidney, Prostate
What is the MOST common organ receiving mets
Adrenals (due to rich blood supply), first in medulla, then spreads to the rest of the gland
Most common organ to SEND mets?
Lung > breast & stomach
Name the paraneoplastic effect of the tumor:
Small cell of lung
ACTH (Cushing’s)
Small cell of lung and intracranial neoplasms
ADH (leads to SIADH)
Squamous cell of lung
PTH-related peptide (leads to hypercalcemia)
Name some more tumors with this same effect
Renal cell, breast cancer, multiple myeloma
Renal cell carcinoma
EPO (leads to polycythemia)
Thymoma / bronchogenic carcinoma
Antibodies against presynaptic calcium channels at NMJ
What can this lead to?
Lambert-Eaton syndrome
What cause microcytic, hypochromic anemia (MCV<80)
Iron deficiency
Lab results
TIBC↑, ferritin↓, serum iron↓↓
What else can cause this type of anemia
Thallasemia and lead poisoning
Note that vit B12 and folate deficiencies are both associated with
Hypersegmented PMNs
What causes macrocytic (MCV>100) anemia
B12 and folate deficiencies
What else?
Drugs that block DNA synthesis
Examples?
Sulfa, trimethoprim, AZT
Normocytic, normochromic anemia causes:
Enzyme defects
G6PD, PK deficiency
RBC membrane defects
Hereditary spherocytosis
Bone marrow disorders
Aplastic anemia, leukemia
Hemoglobinopathies
Sickle cell
Autoimmune pblms
Hemolytic anemia
Common battlefield cause???
Hemorrhage
How do the following labs change with anemia of chronic disease: TIBC, ferritin, iron
TIBC↓, ferritin↑, serum iron↓, ↑storage iron in marrow macrophages
↓serum haptoglobin and ↑serum LDH indicate
RBC hemolysis
How do we distinguish between immune mediated and non-immune mediated hemolysis
Coombs Test
TIBC, serum iron
TIBC = normal
_____ anemia: pancytopenia, severe anemia, failure or destruction of multipotent myeloid stem cell lines
Aplastic
Causes?
Radiation, benzene, chloramphenicol, some viruses
What are the pathological features (ir, cell morphology, marrow presentation)
Pancytopenia with normal cell morphology
Characterize hereditary spherocytosis
Intrinsic, extravascular hemolysis due to spectrin defect
How do RBCs appear
Small, round, no central pallor
Lab tests to confirm?
HgB↑ (MCV↑) b/c there is ‘less’ membrane
How to distinguish from Warm Antibody Hemolysis?
Use a Coombs test. WAH is (+), hereditary spherocytosis is Coombs (-)
Blood dyscrasias
What causes sickle cell
Single amino acid substitution in the beta-HgB chain: substitute glutamic acid with valine
What leads to sickling
Low oxygen environment, dehydration
How do heterozygotes (trait carriers) benefit
Malaria resistant
What diseases are homozygotes at ↑risk for
Aplastic crisis
What TX for HbS involves ↑HbF
Hydroxyurea
Alpha-thalassemia is due to missing alpha-globins (up to 4). If all 4 are missing, what results in utero
Hydrops fetalis and death
Beat-minor vs. Beta-major thallassemia
Minor=beta chain underproduced (heter)
Thalassemia is prevalent in ____ populations
Mediterranean
Beta-thal. Major can result in
Cardiac failure due to secondary hemochromatosis
What is the MOST common cause of DIC
Obstetric causes (amniotic embolus)
Name three more common causes
Gram(-) sepsis, transfusion, trauma, malignancy
Lab findings
PT↑ PTT↑ Fibrin split ptoducts↑ platelets↓
What normaly brings in a pt with platelets pblms
Gums bleed
Whereas, coagulation factor defects bring in the pt with
Hemarthroses, bruising, macrohemorrhage
Causes of platelet pblms include
ITP, TTP, DIC
Hemophilia A =
Factor VIII deficiency
Hemophilia B =
Factor IX deficiency
What is the most common bleeding disorder
Von Willebrand’s
Multiple myeloma: monoclonal ____ cell with fried-egg appearance. Produces large amounts of which Ig?
Plasma call
Pt presents with
Bone lesions and hypercalcemia, ↑susceptibility to infection and anemia
Xray findings?
Punched out lesions
Associated with primary _____
amyloidosis
What is characteristic on serum protein electrophoresis
“M” spike
Urinalysis?
Ig light chains (Bence Jones proteins)
Blood smear show anything?
RBCs stacked like poker chips (rouleau formation)
How does MM compare with Waldenstroms macroglobinemia?
The “M” spike is IgM and there are NO lytic lesions
What causes achalasia
Loss of myenteric plexus (Auerbachs) results in failure of relaxation of LES
Assoc. w/↑risk of
Esophageal carcinoma
Secondary achalasia results from
Chaga’s disease
Barium swallow shows
Bird’s beak
Barrett’s: replacement of ___ with ___
Stratified squamous, columnar
Barrett’s becomes _____
Adenocarcinoma
2. Type B
Both types ↑ risk of
Gastric carcinoma
Name the 2 types of PUD
Gastric and duodenal
Which has ↑ pain w/meals and weight loss
Gastric
Compare H. pylori infection in the two types
70% in gastric
How does food affect duodenal ulcers
Pain is relieved, thus, weight gain
Duodenal ulcers due to
1. ↑ gastric acid secretion
Duodenal also assoc. with hypertrophy of
Brunner’s glands
Who has 2X risk of PUD
Smokers
Chrohn’s vs. UC
Which is infectious and which is autoimmune
Crohn’s: infectious, UC: autoimmune
Location affected?
Crohn’s: anywhere in GI tract / SKIP lesions
Who is transmural
Crohn’s
Which has cobblestone appearance
Crohn’s
Bowel wall thickening (string-sign on xray)
Crohn’s
Which has mucosal pseudopolyps and freely hanging mesentery
UC
Crypt abscesses and ulcers
UC
Which leads to colorectal carcinoma
UC
Which causes malabsorption deficiencies
Crohn’s
Which leads to toxic megacolon
UC
Creeping fat????
Crohn’s
Risk factors for diverticulosis
Age (>60  50%), low-fiber diet
Most common location in bowel
Sigmoid colon
Classic presenting symptoms
LLQ pain
Hirschsprung’s disease: absence of
Parasympathetic ganglion cells (Auerbach’s and Meissner’s plexuses)
Due to failure of
Neural crest migration
The dilated portion of colon is _____ to the aganglionic segment
Proximal
Is Putz-Jeghers a risk factor for colon cancer?
No
Diffuse fibrosis of liver with nodular regeneration=
Cirrhosis
What do the nodules look like
Micronodular (<3mm in size)
When would the nodules be macro-?
Significant liver injury leading to necrosis (post-infectious or drug induced)
In alcoholic hepatitis, AST:ALT ratio >?
Usually greater than 1.5
Budd-Chiari syndrome: associated with?
PCV, pregnancy, hepatocellular carcinoma
What exactly happens in BCS?
IVC occlusion (or hepatic veins) leads to congestive liver disease
_____ is failure of copper to enter circulation in the form of ceruloplasmin
Wilson’s disease
Neurologic side effects
Dementia, choreiform mvmts, basal ganglia degen.
“Classic” finding
Keyser-fleischer rings
Absent UDP-glucuronyl transferase, early death
Crigler-Najjar
Findings?
Jaundice, kernicterus, ↑unconj. Billirubin
What is kernicterus?
Billirubin deposited in brain
TX
Plasma phoresis / phototherapy
What is the milder form?
Gilbert’s
What condition causes ↑conjugated bilirubin due to defective liver excretion
Dubin-Johnson syndrome
Gross pathology?
Black liver
What is the most common primary malignant tumor in the adult liver
Hepatocellular carcinoma (aka hepatoma)
↑incidence assoc. with
Hep B/C, Wilson’s, hemochromatosis, alpha1-anti-trypsin deficiency, ETOH cirrhosis, aflatoxin B1
What two carcinomas are commonly spread by hematogenous dissemination
Renal and Hepatocellular
Child with hepatomegaly, coma and hypoglycemia, what could be the cause
Reye’s syndrome
Which viruses are involved
VZV, Influenza B
Name the three types of gallstones
Cholesterol, pigmented, mixed
Which is most common
Mixed
Which do Native Americans get
Cholesterol
What type do alcolholic get
Pigmented
What are the Four risk factors for stones
Fat, Fertile, Female over Forty
What is Charcot’s Triad
Epigastric/RUQ pain
Epigastric abdominal pain radiating to back is probably
Acute pancreatitis
Likely labs
↑amylase and ↑lipase
Lots of causes for acute, but chronic pancreatitis is strongly assoc. with
Alcoholism
Tumors (adenocarcinoma) in the pancreas are most often in the
Head (obstructive jaundice)
What is Trousseau’s syndrome
Migratory thrombophlebitis
Lungs
What is the hallmark of obstructive lung disease
FEV/FVC ratio is decreased
Why
Air gets trapped inside the lungs
Who are the blue-bloaters
Those with chronic bronchitis
DX
Productive cough for >3 consecutive months in 2 or more years
Hypertrophy of the mucous secreting glands in the bronchioles leads to a Reid index >?
50%
Leading cause?
Smoking
Who are the Pink Puffers
Emphysema pts
Enlargement of___ with decreased ___
Air spaces, recoil
If caused by smoking, it is
Centriacinar
If caused by alpha1-antitrypsin deficiency, it is
Panacinar
In panacinar, you would also look for
Liver cirrhosis
PE findings?
↓breath sounds, tachycardia
Which two lung conditions cause ↓I/E ratios
Asthma and emphysema
____ is a chronic necrotizing infection of bronchi
Bronchiectasis
How do the cilia play a role
Poor mvmt, ↑infections causes purulent sputum
Restrictive lung diseases characterized by
Restricted expansion, thus, ↓lung volumes (↓VC and ↓TLC)
What do the PFT’s look like?
FEV/FVC > 80%
Name two diseases that can cause poor muscular effort
Polio
How do pneumonia and pulm. Edema lead to RLD
Defective alveolar filling
Interstitial fibrosis causes increased recoil which is the same as saying
Decreased compliance
Lethal complications?
Cor pulmonale
Can be due to pulomany fibrosis caused by which two drugs
Bleomycin
obstructive
Asbestosis has two histological features
Ferruginous bodies (fiber coated w/hemosiderin)
Surfactant is produced after the ___ week
35th
What ratio is a measure of lung maturity
Lecithin-to-sphingomyelin in the amniotic fluid
What is this ratio in neonatal RDS
<1.5
Chemical name for surfactant
Dipalmitoyl phosphatydlcholine
TX
Maternal steroids pre-birth, surfactant at birth
What is Kartagener’s syndrome
Immotile cilia due to defective dynein arm
How does this affect fertility (male) and lung function
Sterility
What other MAJOR defect is seen
Situs inversus
Which lung cancer has a clear link to smoking
Squamous and small cell
Which tumor arise peripherally in the lung
Adenocarcinoma
Which is thought to NOT be related to smoking
Bronchioalveolar
Which organism causes lobar pneumonia
Pneumococcus
Characteristics
Intra-alveolar exudates / consolidation of up to entire lung
What organisms cause bronchopneumonia
S. aureus, H. flu, Klebsiella, S. pyogenes
Looks like
Acute inflammatory infiltrates from bronchioles into alveoli
Whereas, interstitial pneumonia looks like
Inflammation localized to interstitial areas at alveolar walls
And its common bugs are
RSV, adenoviruses, mycoplasma, legionella
Pancoast’s tumor characteristics
Ptosis, miosis, anhydrosis
What plexus is involved
Cercical sympathetic
What is the most common cause of dementia in elderly
Alzheimer’s
Senile plaque have the
Amyloid core
What has the abnormally phosphorylated tau protein
Neurofibrillary tangles
Familial form of AD associated with chromosomes
1,14,19,21
Which disease is specific for the frontal / temporal lobes and has intracytoplasmic inclusion bodies
Pick’s
Lewy bodies, substantia nigra, MPTP in street drugs….
Parkinson’s
2 spinocerebellar diseases
Olivopontocerebellar atrophy
Baby born floppy and with tongue fasciculations??
Werndig-Hoffman disease (motor neurons)
Disease with only lower-motor neuron symptoms
Polio
Necrosis, hemorrhage, ‘butterfly’ distribution with poor PX
GBM (adults)
What order doe these tumors occur in children: medulloblastoma, astrocytoma, ependymoma
A > M > E
Which hematoma results from ruptured middle meningeal artery
Epidural (lucid interval and death)
Subdural caused by
Bridging veins – seen in infants/elderly
Subarrachnoid hemorrhage usually do to
Berry aneurysm (or AVM)
What’s seen on LP
Blood
Parenchymal brain hematomas due to
HT, amyloid angiopathy, DM
Where do berry aneurysms occur
Bifurcation in the circle of willis
Most commonly at the
Ant. Communicating artery
Berry aneurysms most often assoc. with
ADPKD
What’s seen in the CSF of MS patients
↑protein (IgG)
Classic triad of MS: SIN
Scanning speech
What is PML
Progressive multifocal leukoencephalopathy
Inflammation and demyelination of peripheral nerves and motor fibers of ventral roots
Pt presents with
Symmetric ascending muscle weakness beginning in lower distal extremities
Is GB assoc. with any particular infections
HSV, C. jejuni, inoculations and stress
Polio is transmitted via
Fecal-oral
Lifecycle?
Replicates in oropharynx and small intestine before spreading to blood / CNS
Once in the CNS, it destroys
Anterior horn of the spinal cord, leading, in turn, to LMN destruction
Virus can be recovered from
Stool or throat
Most common cause of adult seizures
Tumor, trauma, stroke
And kids?
Genetic, infection, trauma
Name the partial seizures
Simple partial
Name the generalized seizures
Absence – blank stare (petit mal)
Most common cause of seizures in the elderly
Stroke, tumor, trauma
Wernicke’s
Superior temporal gyrus=
Broca’s area
Horner’s involves a lesion above what level
T1
What pathway is interrupted in Horner’s
Oculosympathetic pathway
______ : a softening and cavitation around central canal of spinal cord
Syringomyelia
How would pt present
Bilateral loss of pain and temp sensation in upper extremeties w/o loss of touch
Level or injury
C8-T1
Fibers of which tract are damaged
Spinothalamic
Degeneration of dorsal columns and roots due to tertiary syphilis, resulting in impaired proprioception and locomotor ataxia
Tabes dorsalis
Other symptoms/signs
Shotting (lightening) pain
What are the systemic features of RA
Fever, fatigue, pleuritis, pericarditis
What type of Ig’s are the RA antibodies
Anti-IgG antibodies
Gout: precipitation of ____ into joints due to ____
Monosodium urate crystals, hyperuricemia
Cuased by
Lesch-Nyhan, PRPP excess, glucose-6-phospatase deficiency or just decreased excretion
This last category can be due to which RX
Thiazides (competitive inhibitors)
Pdagra?
MTP joint of big toe
Symmetric or asymmetric involvement?
Asymmetric
What is pseudogout caused by
Calcium pyrophosphate crystals
Shape of crystal
GOUT: needle
Classic joint involvement
Knee (large joints in general)
Gender bias
GOUT: men
TX for P-GOUT?
None
Findings in celiac sprue
Northern Europeans
SLE causes LSE?
Libman-Sacks Endocarditis
SLE can cause false (+) _____ tests
Syphilis
What is LSE?
Non-bacterial verrucous vegetations on valves
SLE is a risk for _____ phenomenon
Raynaud’s
What kind of lesions seen in kidney
Wire-loop
Labs to DX
ANA (sensitive, but NOT specific to SLE)
SLE is most common and severe in what population
Black, female
What drugs responsible for reversible SLE syndrome
INH
What disease is prevelant in black females and is known for widespread non-caseating granulomas
Sarcoidosis
What enzyme is elevated
ACE
GRAIN for sarcoidosis
Gammaglobulinemia
HLA-B27 most often associated with
Ankylosing spondylitis
Which is a sero-negative spondyloarthropathy
Reiter’s
Classic triad
Can’t see, pee, or dance
Dry mouth, dry eyes and an arthritis?
Sjoergen’s
What gland is enlarged in Sjoergen’s
Parotid
Predominantly affects _____ between ___and ___
Females, 40-60
Dry eyes, mouth, nose and vagina along with chronic bronchitis and reflux esophagitis=?
Sicca syndrome
_____ = excessive fibrosis and collagen deposition throughout the body
Scleroderma
Diffuse scleroderma assoc. with _____ antibody
Anti-Scl-70
CREST syndrome is the other type of scleroderma
Calcinosis
Associated with _____ antibody
Anti-centromere
Symptoms of Goodpastures
Hemoptysis, hematuria, pulmonary hemorrhages, renal lesions, crescentic glomerulonephritis
Most common afflicts
Men 20-40 y/o
Endocrine / reproductive
cushing's disease (as compared to Cushing's syndrome) is caused by
primary pituitary adenoma secreting ACTH
how is this different from a primary adrenal hyperplasia / neoplasia causing Cushing's syndrome
ACTH↓
Carcinoid syndrome causes _____ AVCTH secretion
ectopic
The most common cause is
iatrogenic (exogenous administration), ACTH↑
in addition to the moon facies, buffalo hump, what are the cardio and metabolic signs
HT
what is the primary cuase of hyperaldosteronism
Conn's syndrome (aldosterone secreting tumor)
Symptoms
HT, hypokalemia, LOW renin level
TX
includes spironolactone
name some causes of secondary hyperaldosteronism
Renal artery stenosis
mechanism of secondary causes
kidney perceives low intravascular volume, results in hyperactive renin-angio system
thus, renin would be
Hign
____ disease is a primary deficiency of aldosterone and cortisol due to adrenal atrophy
Addison's
patient presents with
hypotension and skin hyperpigmentation (↑MSH)
why hypotension?
lack of cortisol leads to hyponatremic volume contraction
how is Addison's different than secondary deficiency
no skin pigmentation in secondary
____ is the most common tumor of the adrenal medulla in adults
Pheo
what about in kids?
neuroblastoma
note that a neuroblastoma can occur anywhere along
the sympathetic chain
pheos are detected by ___ in urine and ___ in blood
VMA, catecholamines
pheos are assoc. with what other conditions
MEN II/III
TX with
phenoxybenzamine (a nonselective, irreversible alpha antagonist)
what is the rule of 10's that applies to pheos
10% malignant, bilateral, extraadrenal, calcify, kids, familial
MEN Type I is aka
Wermer's syndrome
What are the three-P's
Pancreas
what are the common pancreas afflictions
ZE syndrome, insulinomas, VIPomas
MEN Type II is aka
Sipple's syndrome
what three conditions are prevalent in MEN II
medullary carcinoma of thyroid
how are all MEN syndromes inherited
auto. dominant
how is MEN III different than MEN II
oral and intestinal ganglioneuromatosis instead of parathyroid tumor
pretibial myxedema, diffuse goiter, proptosis and EOM swelling, this patient has
graves disease
what are the labs like in HYPOthyroidism
TSH↑, T4↓ and T3↓
what about in HYPERthyroidism
TSH↓, T4↑ and T3↑
cretinism is a result of
lack of iodine
it is endemic wherever _____ is present
endemic goiter
what do these cretin-kids look like
pot-bellies, pale and puffy faced
what type of coma results from Type I diabetes
DKA
and from Type II?
hyperosmolar coma
insulin deficiency (and glucagon excess leads to what 2 'increases' and what 1 'decrease'
Increases: protein catabolism, lipolysis
↑lipolysis leads to what accumulation
↑plasma FFAs, ketonuria, ketonemia
the ↑protein catabolism leads to
↑plasma AA's and nitrogen loss via urine
the small vessel disease in DM is due to
BM thickening
↑plasma FFas lead to
large vessel atherosclerosis, CAD
cataracts and glaucoma due to
sorbitol accumulation
what lab measures long-term diabetic control
HbA1-c
hyperglycemia increases intracellular sorbitol, thereby ↓ intracellular _____ levels
myoinositol
altered inositol pathway leads to ↓ in cellular ____ activity
Na-K-ATPase
what is the genetic predisposition (strong or weak) of Type I/II DM
type I - weak
which ahs the HLA association
Type-I, HLA-DR 3 and 4
DKA is often triggered by
stress (ie infection)
Kussmaul hyperpnea is
rapid, deep breathing
what type of metabolic acidosis in DKA
anion gap
what are two deadly infections that diabetics get
Mucormycosis
intense thirst and polyuria together with an inability to concentrate urine is known as
diabetes insipidus
central DI is due to
lack of ADH
nephrogenic DI is due to
lack of renal response to ADH
what two drugs can cause DI
Lithium
lab findings: SG & serum osmolarity
SG < 1.006 and osmolarity > 290
TX for central DI
intranasal desmopressin (ADH analog)
TX for nephrogenic DI
thiazide, amiloride, indocin
In contrast to DI, what are the results of SIADH
excess water retention, hyponatremia
note that very low sodium levels can lead to
seizures
which cancer can lead to ectopic ADH secretion
small cell lung cancer
second common cause
head trauma
carcinoid syndrome is caused by carcinoid tumors of neuroendocrine cells, esp. of the ______
small bowel
these tumors secret high levels of ____ that does not get metabolized due to liver metastases
serotonin (5HT)
symptoms?
cutaneous flushing and diarrhea, wheezing and carcinoid heart disease
this is the most common tumor of the _______
appendix
detected by right sided valvular disease and ____ in urine
↑5-HIAA
these carcinoid tumors are TX with
octreotide
what type of tumor is assoc. with ZE syndrome
gastrin secreting tumor located in the pancreas
may be assoc. with
MEN-I
what is the relation to race for osteoporosis
whites>blacks>asians
Type I=
post-menopausal
Type II=
senile
type I caused by
↑bone resorption due to ↓estrogen
pt present with
loss of height, kyphosis, vertebral crush
age onset for type-II
>70 y/o
pt presents with
distal radius (Colle's) fractures
BPH is characterized by nodular enlargement of the ______ lobes of the prostate
periurethral (lateral and middle)
BPH is NOT considered a
pre-malignant lesion
what is a hydatidiform mole
a pathologic ovum
results in swelling of _____ and proliferation of
chorionic villi, chorionic epithelium (trophoblast)
HM is the most common precursor to
choriocarcinoma
marker?
high beta-hCG
how does the uterus appear
honeycombed, bunch of grapes
genotype of a complete mole is
46 XX
and is purely ____ in origin
paternal
there is no ____ actually present
fetus
a partial mole is commonly
triploid or tetraploid
endometriosis results in ____ cysts
blood filled, chocolate
____ is the most common site
ovary
endometrial hyperplasia, on the other hand, is caused by excess
estrogen stimulation
most commonly manifest by
vaginal bleeding
what is the most common gyn. Malignancy
endometrial carcinoma
peak ages
55-65
presents with vag. bleeding and often proceeded by
endo. hyperplasia
risk factors
prolonged estrogen use, obesity, diabetes and HTN
what is the single MOST common tumor of females
leiomyoma
race bias?
↑occurrence in blacks
is it estrogen sensitive?
yes, size ↑ in pregnancy and ↓ in menopause
does it lead to any malignancies?
not usually
however, what is the de novo malig. Counterpart
leimyosarcoma
Appearance
bulky with areas of hemorrhage and necrosis
what hormone is elevated in polycystic ovary disease
LH
where does it come from and what is the effect of the ↑LH
peripheral estrogen production and it leads to leads to anovulation
how does the typical pt present
amenorrhea, infertility, obesity, hirsutism
TX?
weight loss, OCP, gonadotropin analogs, surgery
pt presents with diffuse breast pain and multiple lesions, it is deemed to be fibrocystic disease, is it a risk for carcinoma?
not usually, only with the occurrence of atypical cells in epithelial hyperplasia
____ = a large bulky mass of connective tissue and cysts, breast surface has a leaf-like appearance
cystosarcoma phyllodes
benign or malig.?
benign!
____ = most common <25 y/o, small mobile firm mass with sharp edges, ↑ in size and tenderness w/pregnancy
fibroadenoma
benign tumor of lactiferous ducts that presents with nipple discharge
intraductal papilloma
Now for the malignant tumors:
most common carcinoma?
infiltrating ductal
feels like?
firm fibrous mass
eczematous patches on nipple
Paget's
cheesy consistency of tumor due to central necrosis
comedocarcinoma
common risk factors for breast cancer
early menarche (<13 y/o)
important to know that risk is NOT ↑ by what two common occurrences
fibroadenoma
Cardiovascular
race bias for HTN
black>white>asian
how much is due to essential hypertension
90%
remaining 10% due to
mostly renal disease
pathology of HTN?
hyaline thickening and atherosclerosis
____ is the triad of HTN, proteinuria & edema
preeclampsia
eclampsia is the addition of
seizures
risk ↑ with
HTN, diabetes, renal disease, autoimmune disorders
clinical presentation
edema of face, blurry vision, abdominal pain
TX for pre-eclampsia
bed rest, salt restriction, monitor
TX for eclampsia
medical emergency: IV MgSO4 and diazepam
highest risk sites for atherosclerosis
abdominal aorta > coronary artery > politeal artery > carotid artery
angina occurs when CAD narrowing > ?%
>75%
stabile angina manifests as what kind of pain
retrosternal chest pain with exertion
prinzmetal's is secondary to
coronary artery spasm
MI most often occurs in CAD involving which artery
left anterior descending
sudden cardiac death is within 1 hr and is most often due to
arrhythmia
coronary artery occlusion: LAD > ? > ?
LAD > RCA > circumflex
color of infarcted cardiac tissue 1 day - 7 weeks
2-4 days: pallor and hyperemia
maximum neutrophil immigration around
4 days
macrophages show up around
5-10 days (same time as ingrowth of granulation tissue)
gold-standard of MI detection in first 6 hrs?
EKG
what lab test can be used from 4 hrs up to 7 days
troponin-I (most specific)
____ is the test of choice in the first 24 hrs post-MI
CK-MB
which LDH is also elevated
LDH-1
transmural ischemia on EKG shown as
ST elevation
what about transmural infarct
Q-waves
MOST common complication of MI???
arrhythmias (90% of the time)
4-10 days post-MI, look out for
rupture of ventricular free wall, inter-vent. septum, and papillary muscle
friction rub most common ____ days post-MI
3-5 days
and what is it??
several weeks post MI
what are the ABCDs of systolic dysfunction
Alcohol
the ABCDs above lead to dilated (congestive) cardiomyopathy. xray findings?
dilated heart (ballooned)
Hypertrophy of ____ is often asymmetric involving septum
HCM
is it genetic?
yes - 50% cases are familial, inherited AD
how does LV chamber look on echo?
banana shaped
endomyocardial fibrosis, sarcoidosis and amyloidosis all lead to
restrictive / obliterative cardiomyopathy
name the murmur cause:
crescendo-decrescendo systolic
aortic stenosis
high-pitched 'blowing' diastolic murmur
aortic regurgitation
rumbling-late diastolic murmur, LA>LV pressure during diastole, opening snap
mitral stenosis
high-pitched 'blowing' holosystolic murmur
mitral regurgitation
most frequent valvular lesion (esp. in young women)
mitral prolapse
VSD causes what type of murmur
holosystolic murmur
PDA causes
continuous machine-like murmur
___ are the most common cardiac tumor and 90% occur in the
myxomas, atria (mostly LA)
usually described as a ____ obstruction
"ball-valve"
____ are the most frequent cardiac tumors in kids
rhabdomyomas
in pulmonary congestion due to LV failure, what special type of "cells" do we see
heart-failure cells (hemosiderin laden macrophages)
↓contractility leads to ↓CO leads to ↓arterial volume, what two ways does the body compensate
Renin↑ and sympathetic outflow↑
what compenent in the renin pathway leads to ↑renal vasoconstriction
angiotensin II (as does ↑symp. outflow)
what causes ↓GFR
renal vasoconstriction
this causes?
↓urine excretion of NA and water
what is predisposed by Virchow's triad
DVTs
name the triad
stasis, hypercoagulability, endothelial damage
pt has a new murmur, anemia and fever....what do you think
bacterial endocarditis
three classic lesions involved
Roth spots (round whit spots on retina surrounded by hemorrhage)
what other sign is on nailbed
splinter hemorrhages
2. subacute
subacute involves
smaller lesions on preciously abnormal valves
which is assoc. w/dental procedures
subacute
what is the histologic feature of RHD
Aschoff bodies
other key indicators?
migratory polyarthritis, erythema marginatum
any elevated titers?
ASO titers
how does tertiary syphilis cause heart disease
disrupts vasa-vasorum of aorta with consequent dilatation of aorta and valve ring
any particular region of aorta affected
aortic root / ascending aorta
how does the aorta appear?
tree-bark appearance
Burger's Disease aka
smoker's disease
signs/symptoms
intermittent claudication, superficial nodular phlebitis, Raynaud's, severe pain
TX?
quit smoking
____ aka Pulseless Disease
Takayasu's arteritis
why 'pulseless'?
thickening of aortic arch and great vessels leads to weak upper extremity pulses
primarily affects
young, Asian females
FAN MY SKIN ?
Fever, Arthritis, Night sweats, MYalgia, SKIN nodules
what are the findings in Temporal Arteritis
Elderly, ↑ESR, unilateral headache, jaw claudication, impaired vision
TX?
responds well to steroids
P-ANCA
polyarteritis nodosa
_______ is characterized by focal necrotizing vasculitis, necrotizing granulomas in the lung and upper airway and necrotizing glomerulonephritis
Wegener's granulomatosis
TX
cyclophosphamide, corticosteroids, MTX
ethanol is converted to acetaldehyde, how does this lead to fatty change?
acetaldehyde to acetate to acetyl-CoA to increased FA synthesis to fatty liver
what ratio is ↑
NADH/NAD
name two neurological manifestations of alcoholism
flapping tremor of hands
what causes Wernicke-Korsakoff syndrome
Thiamine (B1) deficiency
classic triad of symptoms (of Wernicke's encephalopathy)
psychosis, opthalmoplegia, ataxia
Progression to Korsakoff syndrome involves
memory loss, confusion and confabulation
argyl-robertson pupil pathognomonic for
tertiary syphilis
what do you see?
constricts with accomodation but not reactive to light
ARP
accomodation reaction present
primary amyloidosis seen with what 2 conditions
multiple myeloma, waldenstroms macroglobulinemia
histology?
apple-green birefringence with Congo Red stain
link to Alzheimer's?
beta-amyloid deposition in cortex
whereas, islet cell amyloid deposits seen in
DM Type II
granuloma with giant cells aka
Aschoff Bodies
Aschoff bodies AND _____ are found in RHD
Anitschkow's cells
Think of two ____ with RHeumatic heart disease
RHussians (ascoff and anitschkow)
Auer rods pathognomic for
acute promyelocytic leukemia
what are they?
cytoplasmic inclusions in granulocytes and myeloblasts
presence of Casts in urine indicates that hematuria / pyuria is or _______ origin
renal
RBC casts =
bladder cancer
WBC casts =
acute cystitis
____ casts often seen in normal urine
hyaline
____ casts are often seen in chronic renal failure
waxy
ESR best used to DX and monitor
temporal arteritis and polymyalgia rheumatica
____ = TB granulomas with lobar or perihylar LN involvement
Ghon complex
indicative of
primary infection or exposure
arcus senilis and xanthomas indicative of
hyperlipidemia
Psammoma bodies seen in (PSaMM)
Papillary adenocarcinoma of thyroid
helmet cell or schistocyte indicates
DIC, traumatic hemolysis
Teardrop shaped RBC indicates
myeloid metaplasia with myelofibrosis
Target cells seen in
thalassemias, liver disease
Poikilocytes =
nonuniform shapes in TTP/HUS, DIC
Burr cells =
TTP/HUS
PAIR pneumonic for HLA-B27
Psoriasis
____ = distinctive tumor giant cell seen in Hodgkin's
Reed-Sternberg
Describe
large, bi-nucleate or bi-lobed with the two halves being mirror images (Owl-eyed)
sufficient or necessary for DX
necessary but NOT sufficient
of the 4 types of Hodgkin's, which is more prevalent in women
nodular sclerosis
what is it's PX
excellent
____ = presumptive evidence of malignant visceral neoplasm (even medical students can detect this!)
Virchow's Node
Renal
which glumerular pathology is characterized by hematuria, HT, oliguria and azotemia
nephritic syndrome (i=inflammation)
what do glomeruli look like under LM in post-strep glomerulonephritis
enlarged and hypercellular, PMNs, lumpy-bumpy
most frequently seen in kids, what are the presenting symptoms
peripheral and peri-orbital edema
TX?
resolves spontaneously
what type of glomerulonephritis has crescent-moon shape under LM
rapidly progressing (crescentic)
what does the pt have if they present with hematuria and hemoptysis
goodpastures
IF pattern?
linear
any antibodies?
anti-GBM
which glomerulonephritis has Tram-Track appearance on EM
membranoproliferative
which has mesangial deposits of IgA
Berger's IgA nephropathy
what glomerular pathology presents with massive proteinuria, hypoalbuminemia, edema, hyperlipidemia (due to loss of proteins)
nephrotic (o=proteinemia)
what's the common cause of adult nephrotic syndrome
membraneous glomerulonephritis
what's seen on LM and EM
LM: diffuse capillary and BM thickening
what's the most common cause of childhood nephrotic syndrome
minimal change disease (good PX)
responds well to
steroids
what's seen on EM?
effacement of foot processes
Kimmelstiel-Wilson lesions seen in
diabetic nephropathy
wire-loop patterns?
SLE
name the 4 major types of kidney stones
calcium
which comprises the majority of stones
calcium
xray findings?
stones are radiopaque
recurrence rate?
high
____ are the second most common and are formed in alkaline urine by urease (+) bugs
ammonium
name some bugs
proteus vulgaris
which go hand-in-hand with gout
uric acid stones
often seen in conjunction with what type of disease
those with ↑ cell proliferation and turnover, i.e. leukemia and myeloproliferative disorders
xray findings?
radiolucent (so are cystine stones)
most common renal malignancy?
renal cell carcinoma
most common in
men, 50-70 y/o
assoc. with which syndrome? which chromosome?
von Hippel Lindau, C3
presenting symptoms
hematuria, flank mass, pain, secondary polycythemia
spread?
via IVC to blood!
most common renal malignancy of kids
Wilm's tumor
gene involved?
deletion of tumor suppressor gene WT-1 on C11
what is the WARG complex
Wilm's tumor
tumor in urinary tract is probably
transitional cell carcinoma
presents with
painless hematuria
exposure risks?
phenacetin, analine dyes, cyclophosphamide, smoking
how do you calculate anion gap
Gap = NA - (Cl+HCO3)
normal range
8-12
if elevated, what's the pneumonic
MUD PILES
acute renal failure is most often due to
hypoxia
and chronic?
HTN and diabetes
Renal Failure: how do the following result;
Anemia
failure to make EPO
renal osteodystrophy
failure of active Vit-D production
Hyperkalemia
↓urine output
metabolic acidosis
↓acid secretion
Uremia
↑BUN, creatinine
CHF, pulmonary edema
↓Na and water loss
Tetany caused by ↓?
Calcium
what else is caused by ↓Ca
rickets, osteomalacia
what else is deficient in rickets / osteomalacia
phosphate
metabolic acidosis: what parameter is massively↓
HCO3-
how are pH and pCO2
both ↓
causes?
DKA, diarrhea, lactic acidosis, aspirin OD, acetazolamide OD
compensatory response
hyperventilation to ↓acidity
parameters for respiratory acidosis
pH↓ pCO2↑↑↑ HCO3-↑
Causes
COPD, airway obstruction
Compensation
renal HCO3- reabsorption
parameters for respiratory alkalosis
pH↑ pCO2↓↓ HCO3-↓
Causes
hyperventilation, high altitude
Compensation
renal HCO3- secretion
parameters for metabolic alkalosis
pH ↑ pCO2↑ HCO3-↑↑
Causes
vomiting
Compensation
hypoventilation
henderson-hasselbach equation
pH=pKa +log [HCO3-] / [0.03 pCO2]
what's the blood pH cutoff for acidosis / alkalosis
pH>7.4 = alkalosis, pH<7.4 for acidosis
what's the pCO2 value to know
40
pt presents with pH of 7.3 and pCO2 of 51, what is there classification
resp. acidosis
pt with pH=8.0, pCO2 of 15
resp. alkalosis
pt with pH=7.28 and pCO2=30
metabolic acidosis w/compensation
give two values that lands you in metabolic alkalosis
pH>7.4
what's the next step after discovering that a pt is in metabolic acidosis
determine if it is anion gap acidosis
if not anion gap caused, what's a common cause
diarrhea, glue sniffing renal tubular acidosis
30y/o chemical worker presents with MPTP exposure – what neurotransmitter is depleted?
Dopamine
A woman taking tetracycline shows photosensitivity – what are the clinical manifestations?
Rash on sun exposed regions of the body?
Young girl with congenital valve disease is given PCN prophylactically but develops endocarditis – what should you give her now?
Beta-lactamase resistant PCN.
Non-diabetic pt presents with hypoglycemia but low levels of C peptide – what is the diagnosis?
Surreptitious insulin injection
Black man who goes to Africa develops anemia after taking prophylactic medicine – what is the likely enzyme deficiency?
G6PD
27 y/o female with a hx of psychiatric illness develops urinary retention while on a neuroleptic – what medication would help treat this?
bethanechol
A farmer presents with dyspnea, salivation, miosis, diarrhea, cramping, and blurry vision – what is the likely cause and mechanism of action?
Insecticide poisoning, inhibition of actylcholinesterase
55yo man undergoing tx for BPH has decreased levels of testerone and DHT, gynecomastia, and edema – what is the drug?
Estrogen(DES)
Farmer with a recent kidney transplant is on cyclosporine for immunosuppression and now requires oral meds for candidiasis? What medication given concurrently would result in cyclosporine toxicity?
Ketoconazole