Endocrinology Flashcards
appropriate starting dose for levothyroxine
1.6 microgram/kg lean body weight
25-50 microgram/day for older patients and those with cardiovascular disease
Pharmacologic therapy for patients with Type 2 DM and ASCVD or risk factors for ASCVD
Glucagon-like peptide 1 receptor agonist OR sodium glucose cotransporter 2 inhibitor
Indications for adrenalectomy
1) functioning pheochromocytoma
2)  Aldosterone-producing tumor
3) Hypercortisolism
4) suspicious imaging (size > 4 cm, > 10 Hfu, Absolute contrast wash out of > 60% in 10 min
5) growth of > 1cm/year
Most appropriate diagnostic test for evaluation of cause of hyperthyroidism
Thyroid scintigraphy with radioactive iodine uptake
If RAIU contraindicated, then Thyroid-stimulating immunoglobulin or thyrotropin receptor antibodies
Elevated alkaline phosphatase, hypocalcemia, Whole-body bone scan showing increase update of technetium throughout the skeleton
Osteomalacia
First-line diagnostic test for Cushing syndrome
1) overnight Low-dose dexamethasone suppression test
2) 24- hour urine free cortisol measurement
3) Late-night salivary cortisol measurement
Next step in evaluation for unilateral, nontender, fixed breast mass in male patient
Mammography
Initial treatment for myxedema coma
IV levothyroxine
Percentage of radioactive Iodine uptake for
1) Graves’ disease
2) other causes of thyrotoxicosis such as destructive thyroiditis
1) > 30% (high)
2) < 10% (low)
Appropriate management for symptomatic thyroiditis
Beta-blockers (tachycardia and palpitations)
Anti-inflammatory (prednisone/NSAID; thyroid tenderness/pain)
Sudden hemorrhage or infarction of a pituitary adenoma
Pituitary apoplexy
Potential adverse effects of zolendronic acid that occurs within 1 to 3 days after first administration in 30% patients
Acute-phase response reaction characterized by low-grade fever, myalgia, arthralgia
Most common cause of primary hypogonadism. Typically present in adulthood with tall stature; small, firm testes; infertility; and signs of androgen deficiency
Klinefelter syndrome
Appropriate screening for diabetes mellitus in pregnant women with risk factors for type 2 DM
At time of their positive pregnancy test and again between 24 and 28 weeks gestation if initial test is negative
Diagnostic values for type 2 diabetes mellitus
Fasting glucose: > 126 mg/dL
Random glucose: > 200 mg/dL + symptoms
2-hr OGTT: > 200 mg/dL
HgbA1c: > 6.5%
Diabetes medication that is contraindicated in patients with GFR < 30 and can cause vitamin B12 deficiency
Metformin
Diabetes medications that cause weight gain
Sulfonylureas, Thiazolidinediones, Meglitinides
Diabetes medications that reduce the rates of death by CVD, all cause mortality, and are FDA approved for reduction of CV death in adults with T2DM and CVD
Empagliflozin (also reduces rate of HF hospitalization)
Liraglutide
Diabetes medications that can possibly place patients at increased risk for pancreatitis
DPP-4 inhibitors and GLP-1 mimetics
Diabetes medication that has an adverse effect of UTIs, can possibly increase risk for DKA, and should be used with caution with history of PVD
SGLT2 inhibitors
Screening for complications and patients with type 1 diabetes
Begin at 5 years after diagnosis and performed annually there after
Screening for complications in patients with type 2 diabetes
Begin at time of diagnosis and performed annually there after
1) Dot and blot hemorrhages
2) Neovascularization
1) Nonproliferative diabetic retinopathy
2) Proliferative diabetic retinopathy
Indication to treat for subclinical hyperthyroidism
TSH < 0.1 microU/L + Symptoms, cardiac respecters, heart disease, or osteoporosis
Indications for parathyroidectomy in patients with primary hyperparathyroidism
Fragility fractures, Vertebral fractures, DEXA T score < -2.5 (Lumbar, Yep, femoral neck, distal 1/3 radius)
Evaluation for symptomatic fasting hypoglycemia
Prolonged fast, up to 72 hours, with measurement of plasma glucose, C-peptide, insulin, proinsulin, BHB
Image modality to distinguish type 1 amiodarone-induced thyrotoxicosis (hyperthyroidism) from type 2 (destructive thyroiditis)
Thyroid US with Doppler studies
Diagnostic evaluation for Paget disease of bone
Whole body radionuclide bone scan