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USMLE 3 - Endocrinology
Question made from First Aid for USMLE step 3
42
Medical
Professional
08/21/2009

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Term
What value for a random glucose check fits DM criteria?
Definition
200 or more mg/dL with symptoms
Term
What value for fasting glucose check fits DM criteria?
Definition
126 or higher on two separate reads
Term
What is the glucose lvl criteria for DM after a 2-hr 75g oral glucose load?
Definition
200 or more
Term
What are the three once-daily insulins?
Definition
Lantus (glargine)
Levemir (detemir)
NPH
Term
What tests should be order for a pt in diabetic ketoacidosis?
Definition
CBC
CMP
BUN/creatinine
ABG
serum ketones
CXR
blood culture
UA/cultures
EKG
Term
At what serum glucose lvls should a pt in DKA be switched to D5NS solution? Why?
Definition
once blood glucose lvls are below 250 mg/dL; to prevent hypoglycemia
Term
When should a pt previously in DKA be switched from IV insulin to IM insulin?
Definition
Once anion gap normalizes
Term
Which medication classes can cause a DM type 2 patient to slip into a hyperglycemic hyperosmolar nonketotic state?
Definition
B-blockers
steroids
thiazides
Term
What are the diagnostic criteria for pts to be in a hyperglycemic hyperosmolar nonketotic state?
Definition
serum gluc over 600
pH over 7.3
bicarb over 15
anion gap less than 14
osmolality over 310
Term
What approach is acceptable in the management of both HHNS and DKA?
Definition
fluids, fluids, fluids
Term
What are the three most common microvascular complications of DM?
Definition
retinopathy
nephropathy
neuropathy
Term
How is nonproliferative diabetic retinopathy differentiated from proliferative?
Definition
Nonprolif: cotton wool spots, microaneurysms, blot hemorrhages
Prolif: neovascular
Term
In the initial management of hyperthyroidism what category of medications are most important?
Definition
b-blockers for rate control
Term
Why cardiac arrhythmia may by the initial presentation of hyperthyroidism?
Definition
A-fib (also look for increased pulse pressure)
Term
How is menstruation affected by hypothyroidism?
Definition
heavy bleeding
Term
How is menstruation affected hyperthyroidism?
Definition
irregular periods
Term
Which type of hyperthyroidism is more likely to cause arthralgias and myalgias?
Definition
hypothyroidism
Term
What treatment option is indicated in pregnant pts with hyperthyroidism?
Definition
surgical reduction of thyroid
Term
What immunoglobulins/antibodies are positive in pts with Grave's disease?
Definition
thyroid-stimulating immunoglobulin
thyroglobulin antibody
Term
Which antibody test is positive in pts with Hashimoto's thyroiditis?
Definition
anti-TPO
Term
Regardless of cause what treatment option is indicated in cases of hypercalcemia?
Definition
fluids and Lasix after volume correction (to excrete calcium from blood)
Term
What age groups should be screened for osteoporosis regardless of risk factors?
Definition
older than 65
Term
What types of drugs/deficiences can cause secondary osteoporosis?
Definition
smoking, alcoholism, renal failure, hyperthyroidism, hyperparathyroidism, Vit D def, hypercortisolim, and chronic steroid use
Term
Why should hormone replacement therapy be avoided in osteoporotic pts?
Definition
inceased cardiovascular and breast cancer risk
Term
When should pts be treated for osteoporosis?
Definition
Once T score is less than - 2
or
Once T score is less than -1.5 w/ risk factors for fractures
Term
What are the first line medications of choice for osteoporosis?
Definition
bisphosphonates (-dronates)
Term
How is Cushing's disease different from Cushing's syndrome?
Definition
Cushing's disease IS Cushing's syndrome caused by an adenoma of the pituitary gland
Term
What are the four primary etiologies of cushing's syndrome?
Definition
1. adrenal (adenoma/carcinoma)
2. pituitary (adenoma)
3. ectopic lung cancer
4. exogenous (corticosteroid administration)
Term
Which three labs should be run to determine the underlying cause of Cushing's syndrome?
Definition
1. plasma cortisol
2. urinary cortisol
3. serum ACTH
Term
What test, when positive, is pathomneumonic for Cushing's syndrome?
Definition
increase 24-hr urine cortisol
Term
What is Addison's disease?
Definition
primary failure of the adrenal glands (cortex)
Term
What are the signs/symptoms of Addison's disease?
Definition
hyperpigmentation
dehydration
hyponatremia
hyperkalemia
salt craving
Term
How is adrenal insufficiency determined?
Definition
ACTH stimulation test with subsequent failure to produce appropriate cortisol levels
Term
What medication is the drug of choice in adrenal insufficiency?
Definition
mineral-/gluccocorticoids (hydrocortisone)
Term
What is the most common functional pituitary tumor?
Definition
prolactinoma
Term
What two medications do pts in adrenal crisis need?
Definition
fluid resuscitation and IV hydrocortisone
Term
What are the affects of a prolactinoma on LH and FSH?
Definition
both are decreased
Term
Which class of drugs are used to inhibit the secretion of prolactinomas?
Definition
dopamine agonists
Term
What are the three Ps (characteristics) of Wermer's syndrome (MEN syndrome type I)?
Definition
parathyroid hyperplasia
pancreatic islet cell tumor
pituitary adenoma
Term
What are the two common components of both MEN type IIa and IIb?
Definition
thyroid medullary cancer
pheochromocytoma
Term
What are the three characteristics of MEN type IIa?
Definition
Parathyroid hyperplasia
Thyromedullar cancer
Pheochromocytoma
Term
What are the five characteristics of MEN type IIb?
Definition
Thyromedullar cancer
Pheochromocytoma
Mucocutaneous neuromas
Ganglioneuromatosis of colon
Marfan-like habitus
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