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152 Cards in this Set
- Front
- Back
woman presents with diffuse goiter and hyperthyroidism:what are the expected values of TSH and thyroid hormone?
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low TSH, high thyroid
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48- year old woman presents with progressive lethary and extreme sensitivity to cold:diagnosis please?
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hypothyroid
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patient with elevated serum cortisol levels undergoes a dexamethasone suppresion test. 1 mg of dexamethasone does not decrease cortisol levels, but 8 mg does: diagnosis
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pituitary tumor (ACThoma)
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50 yo man complains of diarrhea- his face is plethoric and a heart murmur is detected: diagnosis?
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carcinoid syndrome
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woman of short stature presents with shortened 4th and 5th metacarpals- what endocrine disoder?
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albright's hereditary osteodystrophy, or pseudohypoparathyroidism
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diabetic patient presents with hypoglycemia but low levels of C-peptide- diagnosis?
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surreptitious insulin injections
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patient's MRI shows filling of sella turcica with cerebrospinal fluid: most likely clinical presentation
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normal- residual pituitary tissue is functional and can compensate: empty sella turcica syndrom
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patient complains of double vision, gynocomastia, and headaches: most likely diagnosis
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prolactinoma-
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patient presents with hypotension and bronzed skin: diagnosis
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1 adrenocortical deficiency (addison's )
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primary regulatory control and secretory product of : zona glomerulosa
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Renin- angiontensin system ---aldosterone
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primary regulatory control and secretory product of: zona fasciculata
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ACTH, hypothalamic CRH ---- Cortisol, sex hormones
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primary regulatory control and secretory product of: zona reticularis
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ACTH, hypothalamic CRH ---- sex hormones
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primary regulatory control and secretory product of: adrenal medulla
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preganglionic sympathetic fibers----- catacholamines
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most common tumor of the adrenal medulla of adults
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pheochomocytoma
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most comm tumor of the adrenal medulla in children:
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neuroblastoma- does not cause episodic HTN like pheochromocytoma
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adrenal drainage (veins) of right adrenal gland vs left
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left adrenal gland goes to left renal vein to IVC, while right goes straight to IVC (same as left and right gonadal veins)
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alpha subunit is common to ____, ___, ____, and _____ hormones:
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FSH, LH, TSH, bHCG
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Flat pig nemonic-
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just a reminder here
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in the islet of langerhans- the alpha cells secrete ______ and are located ______
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glucagon , peripherally
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in the islet of langerhans- the beta cells secrete ______ and are located ______
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insulin, centrally
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in the islet of langerhans- the delta cells secrete ______ and are located ______
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somatostatin, interspersed
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prolactin _____ DA release from the hypothalamus and _____ GnRH release
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increases, decreases
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the hormone that blocks anterior pituitary release of prolactin is _______, while _____ increases secretion of prolactin at the pituitary
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DA, TRH
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bromocriptine is a DA _______ and will _______ release of prolactin from the anterior pituitary
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agonist, inhibit
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amenorrhea is commonly seen in prolactinomas because prolactin inhibits _____
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GNrH
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TRH stimulates both _____ and ______
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TSH , prolactin
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somatostatin inhibits both ____ and _____
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GH, TSH
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decrease sex hormones, decrease cortisol, increase mineralocorticoids. HTN, hypokalemia- phenotypically female but no maturation
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17 alpha hydroxylase deficiency : can't get out of column 1 - make aldosterone
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decrease cortisol, increased ACTH, decrease mineralocorticoids, increased sex hormones- masculinization, femal pseudohermaphrotitism, hypotension, hyperkalemia, increase plasma renin, volume depletion. Salt wasting can lead to hypovolemic shock in newborn.
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21-hydroxylase deficiency- most common form (no aldo or cortison)
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decrease cortisol, aldosterone, corticosterone, increase sex hormones resulting in masculinization, hypertension
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11beta-hydroxylase deficiency
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testosterone to DHT enzyme
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5alpha-reductase
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testosterone to estradiol enzyme
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aromatase
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the _____ cells of the parathyroid secrete PTH
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chief
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decrease in _______ results in an increase in PTH
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free serum Ca++
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increases bone resporption of calcium and phosphate
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PTH
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increases kidney reabsorbtion of calcium in distal convoluted tubule
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PTH
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decreases kidney reabsorption of phosphate: hormone:
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PTH
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PTH increases 1,25 OH2 vit D production by stimulating ______ in the kidney
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1alpha hydroxylase
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PTH _____ serum Ca+, ____ serum phosphate, _____ urine phosphate
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increases, decreases, increases (PTH = phosphate trashing hormone_)
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T/F - PTH stimulates both osteoclasts and osteoblasts
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TRUE- directly stimulates osteoblasts, indirectly stims osteoclasts
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_____ directly increases intestinal calcium resorption: hormone
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1,25 OH2 vitamin D------ (PTH stimulates vit D production- so it does this indirectly)
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vitamin D__ is generated from sun-exposed skin, vitamin D__ is from plasnts.-- both are converted to ___ in the liver and ___ in the kidney
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D3, D2, 25 OH, 1,25 OH2
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vitamin D deficiency results in ____ in children and _____ in adults
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ricketts, osteomalacia
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Vit D increases absorption of both dietary ____ and ____.
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ca, phosphate
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triggers of increase 1,25 OH2 vitamin D:
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increase PTH, decrease Ca, phosphate ----> vit D negative feedback on itself
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following imbalances suggest what disorder: Ca up , Phosphate down , ALK phosphate up , PTH up
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hyperparathyroidism
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following imbalances suggest what disorder: Ca nl/up , Phosphate nl , ALK phosphate way up , PTH nl
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paget's disease of the bone
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following imbalances suggest what disorder: Ca up , Phosphate up , ALK phosphate nl/up , PTH down
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vit D intoxication
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following imbalances suggest what disorder: Ca down , Phosphate down , ALK phosphate up , PTH up
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vit D deficiency (osteomalacia)
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bone disorder following imbalances:
Ca nl , Phosphate nl , ALK phosphate nl , PTH nl |
bad question - but profile in osteoporosis
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following imbalances suggest what disorder: Ca nl , Phosphate nl , ALK phosphate nl , PTH up
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renal insufficiency
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calcitonin is made in the ______ cells of the thyroid
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parafollicular (C cells)
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calcitonin ____ bone resorption of calcium
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decreased (opposes actions of PTH)
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____ serum Ca causes release of calcitonin
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increased
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Most T3 is formed in the ______
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blood
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the 4 functions of T3 are (4Bs): ____, ____, ____, _____.
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brain maturation, bone growth, beta-adrenergic effects, increase BMR (increase Na/K/ATPase activity = O2 consumption, RR, increase in body temp)
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TSH stimulates _____ cells in the thyroids
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follicular cells
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hepatic failure would result in a ____ in TBG, while pregnancy would result in a ____ in TBG
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decrease, increase (estrogen increases TBG)
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functions of cortisol include: 5
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1)anti-inflammatory, 2)increase gluconeogenesis, lipolysis, proteolysis, 3) decrease immune function, 4) maintain BP, 5) decrease bone formation
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Insulin and IGF signal through ______ receptors
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tyrosine kinase
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brain and RBC take up glucose independent of insuline via _______ receptors
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glut-1
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dexamethasone supression test results: decrease cortisol after low dose
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healthy axis
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dexamethasone supression test results: high cortisol after low dose, decrease after high dose
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ACTH tumor (Cushing's disease)
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dexamethasone supression test results: high cortisol after low and high dose
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ectopic ACTH (small cell carcinoma) or cortisol producing tumor
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HTN, weight gain, moon facies, truncal obesity, buffalo hump, hyperglycemia, skin changes, osteoporosis, amernorrhea and immune suppression
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cushing's syndrom
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pituitary tumor leading to increased ACTH is call ______ disease
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cushings
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primary adrenal (hyperplasia/neoplasia) results in _____ ACTH and ______ syndrome
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decreased , cushings
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ectopic _____ production as seen in small cell lung cancer, can lead to cushing's syndrome
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ACTH
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primary ________, or Conn's syndrome, is caused by a _________ secreting tumor.
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hyperaldosteronism, aldosterone
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hypertension, hypokalemia, metabolic alkalosis, and LOW plasma renin
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Conn's (hyperaldo)
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secondary hyperaldosteronism is caused by ?
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renal artery stenosis, chronic renal failure, CHF, cirrhosis, or nephrotic syndrome.
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secondary hyperaldosteronism is differentiated from primary base on what lab value?
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plasma renin- low in primary (Conn's) and high in secondary
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hypotension, and skin hyperpigmentation
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addison's disease
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deficiency of ____ and ____ due to adrenal atrophy causes addison's disease
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aldosrterone and corticol
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Adrenal atrophy, Absence of hormone production, involves all 3 layers of cortex:
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addison's disease
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adrenal hemorrhage syndrome associated with meningoccocal septocemia
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waterhouse-friderichsen syndrome- acute adrenocortical insufficiency
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pheochromocytoma derived from _____ cells of __________ origin
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chromaffin cells of neural crest origin
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Pheochromocytomas are associated with _______ and MEN types ____ and ____
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neurofibromatosis, men types II, III
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most common adrenal medulla tumor in adults
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pheochomocytoma
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most common adrenal medulla tumor in children - associated with the ____ oncogene
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neuroblastoma, n-myc
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pheochromocytomas present with ____ in the urine, while neuroblastomas present with _____ in the urine
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VMA, HVA
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postpartum- fatigue, anorexia, poor lactation, and loss of pubic and axillary hair-
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sheehan's
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pheochromocytomas are treated with __ antagonists, especially _____, a nonselective irreversible blocker
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alpha, phenoxybenzamine
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rule of 10's- 10% malignant, bilateral, extra-adrenal, calcify, kids, familial applies to what disease?
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pheochomocytoma
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pancreas (Z-E syndrome, insulinomas, VIPomas), parathyroid, and pituitary tumors (prolactinoma)- presents with kidney stones and stomach ulcers-
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MEN type I
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medullary carcinoma of the thyroid, pheochromocytoma, parathyroid tumor
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MEN type II
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medullary carcinoma of the thyroid, pheochromocytoma, oral and intestinal ganglioneuromatosis (mucousal neuromas)
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MEN type III
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all MEN syndroms have ______ inheritance, and type II, III are associated with the ____ gene
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AD, ret
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rule regarding MEN syndromes and Ps-
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inverse- MEN 1 has 3 P's (pit, panc, parathyroid), MEN II (pheo, parathyroid), MEN III (pheochromo)
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cold intolerance, hypoactivity, weight gain, fatigue, lethargy, decreased appetite, constipations, weakness, decreased reflexes, myxadema, dry, cool skin, and coarse brittle hair
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hypothyroid
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heat intolerance, hyperacticity, weight loss, chest pain/palpations, arrythmias, diarrhea, increased reflexes, warm, moist skin, and fine hair
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hyperthyroidism
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stimulating TSH receptor antibodies.
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Graves- type II hypersensitivity
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ophthalmopathy, pretibial myxadema, diffuse goiter, presents during stress
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Graves- type II hypersensitivity
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thyroid replaced by fibrous tissue
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riedel's thyroiditis
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underlying graves with stress-induces catacholamine surge leading to death by _________: diagnosis
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arrythmia- thyroid storm
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slow course, moderatley enlarged nontender thyroid- wuth lymphocytic infiltrate in the germinal centers: hurthle cells on histology: hypothyroid
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hoshimoto's thyroiditis
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antimicrosomal and antithyroglobulin abs
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hoshimoto's thyroiditis
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self-limited hypothyroid often post-flu-like illness (may be hyperthyroid early in course)
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subacute thyroiditis (de quervain's)
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hypothyoid with elevated ESR, jaw pain, early inflammation, very tender thyroid gland- histology show granulomatous inflammation
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subacute thyroiditis (de quervain's)
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goider post iodine deprivation and iodine restoration-
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toxic multinodular goiter - releases T3 and T4
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most common thyroid cancer-
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papillary- good prognosis
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thyroid cancer with "ground-glass" nuclei (orphan annie)
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papillary
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thyroid cancer from parafollicular "c-cells" that produce calcitonin and sheets of cells in amyloid stroma
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medullary
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thyroud cancer associated with MEN types II, III
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medullary
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lymphoma in thyroid gland is associated with what disease?
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hashimoto's thyroiditis
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endemic cretinism is caused by _________ while sporadic is caused by a defect in ________.
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lack of iodine, defect in T4 or developmental failure of thyroid
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pot-bellies, pale, puffy faced child with protruding umbilicus and protuberant tongue
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cretinism- common in china
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large tongue with deep furrows, deep voice, large hands and feet, coarse facial features, impared glucose intolerance
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acromegaly (GH)
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what is used to treat acromegally?
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octreotide- (somatostatin that inhibits release of GH, glucagon, insulin, and gastrin)
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cystic bone spaces filled with brown fibrous tissue ?
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osteitis fibrosa cystica(part of hyperparathyroidism)
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what are the stone, bones, and groans of primary parathyroidism?
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stones = hypercalciuria bones= osteitis fibrosa cystica gorans= weakness an/or constipation
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secondary hyperparathyroidism is commonly cuased by a decrease in _________, most often due to _________
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serum calcium, chronic renal failure
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difference between 1 and 2 hyperparathyroidism as far as blood labs-
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primary (usually adenoma) = hypercalcemia, hypo phosphatemia, secondary (renal disease) =hypocalcemia, hyper phosphatemia,
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bone lesion due to seconadry hyperPTH due to renal disease is called _______
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renal osteodystrophy
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chvostek's sign- =?
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tap facial nerve, contraction of muscles indicates hypocalcemia (tetany) as in hypoparathyroidism
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trousseau's sign =?
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occlusion of braichial artery with BP cuff- carpal spasm- as in hypocalcemia in hypoPTH
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AD disorder with kidney unresponsive to ______. Results in hypocalcemia, shortened 4th/5th digits, short stature..
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PTH, psuedohypoparathyroidism
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treatment for prolactinoma
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bromocriptine (DA agonsist)
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what are chronic manifestations of Diabetes and nonenzymatic glycosylation on small vessels?
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diffuse thickening of the basement membrane leads to retinopathy, glaucoma, nephropathy (nodular sclerosis,progressive proteinuria, chronic renal failure, arteriosclerosis leading to HTN, kimmelstiel-wilson nodules)
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what are chronic manifestations of Diabetes and nonenzymatic glycosylation on large vessels?
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large vessel artherosclerosis, CAD, peripheral vascular occclusive disease and gangrene, cerebrovacular disease
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what 2 manifestations of osmotic damage are seen in DM
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neuropathy ( monot, sensory, autonomic degeneration), and cataracts (sorbitol accumulation)
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HLA ___ and ___ are associated with type I DM, not type II
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DR3 DR4
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Diabetic ketoacidosis is usually triggered by _____
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increase in insulin requirement as in stress or infection
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where do ketone bodies come from during DKA
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excess fat breakdown (insulin resistance) and increased ketogenesis from the increase in free Fas, which are made into ketone bodies (beta-hydroxybutyrate> acetoacetate)
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signs and symptoms of DKA
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kussmaul respirations, N,V, abd. Pain, psychosis/delerium, dehydration. Fruity breath odor
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in DKA, the follwing labs are seen hyperglycemia, ___H+, ___ HCO3-, increase blood ketones, leukocytosis, ____kalemia, ____ intracellular K+ due to decreased insulin.
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increase, decrease, hyper, decrease
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mucormycosis, rhizupus infections, cerebral edema, cardiac arrhythmias, heart failure are all copmlications of:
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DKA
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Tx for DKA includes:
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fluids, insulin, K (intracellular stores), glucose if necessary to prevent hypoglycemia
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intense thirst and polyuria without ability to concentrate urine:
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Diabetes Insipidus (no ADH)
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test for diabetes insipidus:
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water deprivation test- urine osmolality doesn't increase (response to desmopressin distinguishes between primary (works) and secondary (as in kidney- doesn't work)
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in DI, urine S.G. ______, while serum OSM ________
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decreased (<1.006), increased >290 OSM
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central DI is treated with ________, while nephrogenic DI is treated with ________
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desmopressin (ADH analog), diarrhetics (hydroclorothiozide, indomethacin? , amiloride) both need adequate fluid intake
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SIADH results in 1______2______3______
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excessive water retention, hyponatremia, urine osmolarity> serum osmolarity
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SIADH treatment is with 1_______(easiest) or 2________
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water restriction, demeclocycline?
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top 4 causes of SIADH:
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1) ectopic- small cell lung cancer 2) CNS disorder/head trauma 3) pulmonary disease 4) drugs (cyclophosphamide)
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recurrent diarrhea, cutaneous flushing, asthmatic wheezing, and right-sided valvular disease: increase in 5-HIAA in urine
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carcinoid syndrome
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most common tumor of appendix
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carcinoid syndrome
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carcinoid tumors are derived from ______ cells, and secrete high levels of ______ (although not seen if goes through 1st pass metabolism)
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neuroendocrine, 5-HT
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treatment for carcinoid syndrome
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octreotide- (somatostatin that inhibits release of GH, glucagon, insulin, and gastrin)
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rule of 1/3's appies to what? 1/3 metastasize, 1/3 present with 2nd malignancy, 1/3 multiple
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carcinoid syndrome
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gastrin-secreting tumor of pancrease or duodenum- causes recurrent ulcers.
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Zollinger-ellison syndrome
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MEN type I assocaited with this disease of the pancrease or duodenum
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Zollinger-ellison syndrome
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MOA of sulfonylureas
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close the K+ channel in B-cell --> depolarizes cell--> triggering insulin release via influx of Ca++
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MOA of metformin
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unkown- possibly decrease gluconeogensis
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MOA of glitazones
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increase target cell response to insulin (skeletal muscle, adipose tissue)
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MOA of alpha-glucoside inhibitors
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inhibit intestinal bruch border alpha-glucosidases- delayed sugar hydrolysis and glucose absorption--> decreased postprandial hyperglycemia
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which diabetic drug class can result in disulfam-like effects
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sulfonylureas
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lactic acidosis is the most grave toxicity of this diabetes drug
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metformin
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these diabetic drugs can result in weight gain, edema, hepatotoxicity, and CV toxicity. Nasty
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glitazones
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tolbutamide and chlorpropamide are 1st generation ______
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sulfonylureas
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glyburide , glimepiride, anf glipizide are 2nd gen______
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sulfonylureas
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acarbose and miglitol belong to the ____ class of antidiabetic drugs
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alpha-glucosidase inhibitors
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