Endo Flashcards
When epinephrine is released as a counterregulatory hormone to hypoglycemia, what is the MC clinical manifestation?
sweating
What are the 2 main physiologic activities for vasopressin (ADH)?
- conserves water
2. raise BP by causing constriction of the arterioles
What are the 2 main physiologic activities of oxytocin?
- Milk ejection from breasts
2. stimulates uterine contraction
What effect does somatostatin have on GH?
inhibits the release of GH from ant. pit.
How can a pt w/ prolactinoma be treated medically in order to dec. prolactin release?
dopamine agonists can suppress prolactin hormone release
What are the 2 main physiological effects of growth hormone in the body?
- promotes the growth of bone & muscle mass
2. increases blood glucose
What hormone deficiency state is the reason for the majority of adults to present to clinical practice?
FSH & LH deficiency
What is the medical therapy for a pt w/ excess GH secretion in a pt who is post-pubertal?
somastostatin analog (ex octreotide)
What dopamine agonists are used in the mgmt of prolactinoma?
cabergoline & bromocriptine
What hormones are secreted from the various portions of the adrenal gland?
Medulla: catecholamines Epi & NE
Zona glomerulosa: mineralocorticoids
Zona fasciculata: glucocorticoids
Zona reticularis: androgens
What is the classic WBC findings in a pt w/ Cushing’s Syndrome?
leukocytosis
Where is the MC site of ectopic cortisol pdt’n leading to Cushing’s Syndrome?
lung cancer (particularly small cell)
What clinical sign is seen in a pt w/ Addison’s dz that is not in a pt w/ other causes of adrenal insufficiency?
hyperpigmentation
What is the main test used in the assessment of a pt suspected of having Addison’s dz?
ACTH stimulation test
Name the condition that occurs as a result of hemorrhage into both adrenal glands.
Waterhouse-Friderichsen Syndrome
What catecholamine is secreted to the greatest extent in a pt w/ pheochromocytoma?
NE > Epi > dopamine
What metabolic effect condition is MCly confused w/ pheochromocytoma?
hyperthyroidism
What effect is seen in the thyroid gland in a pt who has struma ovarii?
hyperthryoidism
- due to increased secretion b/c these ovarian tumors have ectopic thyroid tissue capable of secreting thyroid hormone
What 2 PE signs will be seen in a pt w/ Graves’ dz vs other causes of hyperthyroidism?
- pretibial myxedema
2. exophthalmus
What is the most serious SE that occurs in a pt w/ hyperthyroidism that is treated w/ PTU or methimazole?
agranulocytosis
For a pt w/ hyperthyroidism who is treated w/ radioactive iodine, what is the average length of time until the pt becomes euthyroid?
2-3 mths
What is the classic DTR abnormality that occurs in a pt w/ hypothyroidism?
delayed tendon reflex relaxation
What 2 thyroid Abs are ordered in the assessment of Hashimotos’s thyroiditis?
- thyroid peroxidase
2. antithyroglobulin Abs
What are the 2 MC metabolic effects seen in a pt w/ myxedema coma?
hyponatremia & hypoglycema
Name the MC precipitating factor for the development of subacute thyroiditis:
preceding URI or other viral syndrome
What is the MC setting for silent (PAINLESS) thyroiditis to occur?
post-partum
What are the typical lab findings in a pt w/ silent (PAINLESS) or lymphocytic thyroiditis?
sed rate is normal
What is the recommended next step for a pt who has a single firm thyroid nodule but normal thyroid fxn tests?
FNA bx
What is the MC type of endocrine malignancy?
thyroid cancer
Pts w/ iodine deficiency are at highest risk for the development of what type of thyroid cancer?
follicular cancer
What type of thyroid cancer is most difficult to identify via a FNA bx?
follicular cancer
What is the MCly identified underlying cause for hyperparathyroidism?
parathyroid adenoma (80%)
What are the 2 MC disorders resulting in high bone turnover that results in hypercalcemia?
- hyperthyroidism
2. immobilization
What eye disorder is visible in a pt w/ long-standing hyperparathyroidism?
banded keratopathy
gray ring around the iris that occurs from high calcium levels
banded keratopathy
What bone disorders result from chronic hyperparathyroidism?
osteopenia & bone cysts (osteitis fibrosa cystica)
What are the 2 MC etiolgies for hypoparathyroidism?
- iatrogenic
2. Mg deficiency
What PE is MCly seen in a pt w/ familial hypertriglyceridemia?
eruptive & palmar xanthomas
What is the optimal LDL goal for a pt who suffered a high risk for coronary artery event or who has coronary artery equivalent?
<70 LDL
What is the MCly used fibrate used in clinical medicine?
fenofibrate (Tricor)
phenomena due to nocturnal hypoglycemia which results in an increase in the release of counterregulatory hormones usch as Epi which causes rebound hyperglycemia by 7 AM
Somogyi phenomena
phenomena in which there is an early AM circadian increase in the plasma glucose that occurs as a result of normal spikes of nocturnal GH
Dawn phenomenon
What is the motor abnormality that results when CN III is involved w/ diabetic motor neuropathy?
diplopia & ptosis
What is the motor deficit for CN IV & VI?
diplopia
What is the most likely underlying condition for necrobiosis lipodica diabeticorum?
DM
Glitazones should be avoided in what clinical conditions?
liver dz & HF
What class of diabetic meds decrease post prandial blood glucose, decrease glucagon secretion, decreased hepatic glucose pdt’n & decreases food consumption & gastric empyting?
Amylins
What is the main synthetic amylin analog that is used in the US?
Pramlintide [Symlin]
2 hormones that are released by the post. pit gland
- vasopressin (ADH)
2. oxytocin
What is the MC infiltrative dz that affects the pit. gland?
hemochromatosis
Hypopituitarism caused by pituitary stalk dysfxn that occurs as a result of post-partum hemorrhage or post-partum HoTN is known as:
Sheehan’s syndrome
Uterine failure due to overzealous stripping of the uterine cavity during a D&C
Asherman’s syndrome
Type of surgical procedure approach MCly done to resect pituitary tumor:
transphenoidal approach
TOC for pts w/ central diabetes insipidus
desmopressin (DDAVP)
What electrolyte abnormality is seen in a pt w/ Sarcoidosis?
hypercalcemia
What test is typically ordered to follow a pt w/ Sarcoidosis?
ACE levels
TOC for pts w/ Sarcoidosis
Corticosteroids
Name the MC medication cause of nephrogenic DI
Lithium carbonate
What is the MC secreted hormone for pts w/ pituitary turmor?
Prolactin
What is the initial visual loss that occurs in a pt w/ pituitary tumor?
bitemporal hemianopsia
Evaluation test of choice for pts w/ suspected pit. tumor
MRI
Group of meds that may promote prolactin secretion
Antipsychotics
Pt w/ pit. dysfxn who has coarse facies, HTN, CM, & insulin resistance most likely has excess secretion of what pit. hormone?
Growth hormone
What is the medication of choice used in the mgmt of Graves’ dz during pregnancy?
PTU (proplythiouracil)
What anti-thyroid med acts to suppress thyroid hormone release & also decreased peripheral conversion of T4 to T3?
PTU
What is the MCC of hypothyroidism in the US?
Hashimoto’s thyroiditis
What is the MCC of hypothyroidism in the world?
iodine deficiency
How soon should TSH levels be checked after starting thyroid replacement w/ levothyroxine?
6-8 wks after starting therapy
Name this serious endocrine condition: hypoxia, hyponatremia, hypothermia, & HoTN
Myxedema coma
What GI tract radiographic abnormality is assoc. w/ hypothyroidism?
toxic megacolon
initial diagnostic procedure performed in the assessment of thyroid nodule
FNA
MC type of thyroid cancer
papillary
Type of cancer that MCly results in ACTH-secreting tumor:
small cell lung cancer
Screening test for the evaluation of Cushing’s dz:
24-h urine cortisol
Confirmatory test for proving that a pt has Cushing’s dz:
dexamethasone suppression test
MCC of primary chronic adrenal insufficiency:
Addison’s dz
Name the 2 electrolyte abnormalities that are seen in Addison’s dz:
low sodium & high potassium
normal stimulation for the pdt’n & release of aldosterone
hypotension, hypovolemia
Screening test used for pheochromocytoma:
urinary metanephrines
Pts w/ hypertriglyceridemia should be assessed for what two other endocrinopathies
hypothyroidism & DM
HLA-DR3 & HLA-DR4 are assoc. w/ what endocrine disorder?
DM
What formulation of insulin has the quickest onset of activity when injected?
Lispro
What type of insulin lasts 24h, does not have a peak:
Lantus (glargine insulin)
Known SE is pt take metformin (Glucophage) & is exposed to ionic dyes:
lactic acidosis
Most severe type of retinopathy that is related to DM & is the leading cause of blindness
proliferative
Method by which proliferative retinopathy is treated to bring a/b a quiescent state:
laser photocoagulation
Target level of Hb A1C in pts w/ DM according to the American College of endocrinolgists:
<6.5
Preprandial glucose goals in pts w/ DM:
80-120 mg/dl
Most important dietary limitation for pts w/ T2DM:
calories
Humalog (Lispro) is classified as what type of insulin?
very rapid acting
Class of medication for metformin (Glucophage)
biguanide
Acarbose (Precose) is classified as what type of diabetic agent?
alpha glucosidase inhibitor
Adv. for the use of metformin over other agents used in the mgmt of T2DM:
promotes wt. loss
Name the conditions assoc. w/ CHAOS or Syndrome X:
CHAOS Coronary heart dz HTN Atherosclerosis Obesity Stroke
2 meds that are utilized in the mgmt of Syndrome X:
Metformin & statins
Length of time for the 1/2 life of T4:
one week
TOC for myxedema coma:
IV levothyroxine (Syntrhoid)
A pt w/ proptosis & hyperthyroidism is known to have what specific type of hyperthyroidism?
Graves dz
Loss of lateral 1/3rd of eyebrows is classically assoc. w/ what condition?
hypothyroidism
A pt given an iodine contrast agent who then has an increase in thyroid hormone release w/ resultant hyperthyroidism has a condition that is known as:
Jod Basedow phenomena
A pt who has thyroid stimulating immunoglobulin that binds to the TSH receptor & acts as a receptor agonist is said to have what dz?
Graves dz
What is the main med class that is used in the tx of hyperthyroidism which prevents the peripheral conversion of T4 to T3?
BBs
MCC of subacute thyroiditis:
viral - mumps, coxsackie
Antimicrosomal Abs may be seen in what type of thyroid dz?
postpartum thyroiditis
increased urinary osmolality in comparison to serum osmolality
SIADH
TOC for adrenal crisis
IV cortisol
Somatostatin (octreotide) is given continuously for what pituitary disorder?
Acromegaly
What hormone marker is MCly used to identify a female’s perimenopausal state?
increased FSH
What sensory defect will pts w/ Kallman’s sydnrome have?
lack of smell
In addition to increased serum calcium levels, what other lab abnormality will be seen in a pt w/ Paget’s dz?
Increased serum alkaline phosphatase
2 MC tx modalities for acute hypercalcemia:
IV NS for fluid expansion followed by Lasix & IV infusion of bisphosphonates
T score is MCly used in the assessment of what condition
Osteoporosis
Adv to the use of calcitonin in the mgmt of osteoporosis:
analgesic effects
Category of med for raloxifene (Evista)
SERM (selective estrogen receptor modulator)
Hormonally-related problem that may worsen when a pt takes raloxifene:
increase in hot flashes
TOC for pts w/ Paget’s dz
bisphosphonate
Serious complication that may be assoc. w/ long-standing Paget’s dz: s
osteogenic sarcoma
What emd is commonly prescribed to pts who are taking INH in order to prevent peripheral neuropathy?
Vit. B6 - pyridoxine
Cretinism is due to the lack of:
Thyroid hormone
70/.30 insulin administration typically consists of what type component of insulin?
70% NPH & 30% regular
MCC of treduced total serum calcium:
hypoalbuminemia
MCC of non-caseating granuloma in the lung in a young AAF
Sarcoidosis
Give the lab presentation for subclinical hypothyroidism:
TSH elevated w/ a normal T4 level
3 tx that are used for hyperthyroidism
- surgery
- antithyroid meds
- radioactive iodine
Name 3 meds that are assoc. w/ thyroid dysfxn
- amiodarone
- lithium
- iodine
What is the preferred tx for an elderly person w/ hyperthyroidism?
radioactive iodine
what is the cornerstone of therapy for the tx of T2DM?
lifestyle modifications
in a normal risked individual w/o sx, what is the MCly used age to screen for DM?
45 yoa
What hormone will be released in a pt who has acute decreased Mg levels?
parathyroid hormone
what single grp of pts is at highest risk for the development of hyperparathyroidism?
elderly females
What is the MC renal complication of primary hyperparathyroidism?
renal calculi
What is the name of the bone complication seen in primary hyperparathyroidism?
osteitis fibrosa cystica