Endocrine Flashcards
(120 cards)
Best test for excluding thyroid disease in asymptomatic patients?
TSH
Next best test for patient who presents with NML free T4, mildly elevated TSH?
Measure anti-TPO Ig
Patient presents with NML free T4, mildly elevated TSH – diagnosis?
Subclinical hypothyroidism
4 groups of patients with subclinical hypothyroidism who should be treated with low-dose levothyroxine?
Elderly, Pregnant, (+) anti-TPO Ig, Hypercholesterolemia
Change to levothyroxine dose during pregnancy?
Increase by 33%
Which other group of females require increase in levothyroxine dose?
Females on estrogen replacement therapy
Why do females on estrogen therapy require higher doses of levothyroxine?
Induction of liver enzymes
Change to thyroid hormones during pregnancy?
Increased thyroid binding globulin, Increased Total T4, NML free T4, NML TSH
4 medications that interact with levothyroxine … inhibiting absorption?
Ferrous sulfate, cholestyramine, calcium carbonate, sucralfate
Classic triad of symptoms seen in Graves Disease?
Goiter, Ophthalmopathy, Dermopathy
Which symptom in Graves Disease is irreversible?
Ophthalmopathy
Which test distinguishes Graves Disease from Thyroiditis?
Radioactive iodine uptake … early in its course, thyroiditis may mimic Graves Disease
Radioactive iodine uptake in thyroiditis?
NML
Radioactive iodine uptake in Graves Disease?
Increased
35 yo female who is 4 months pregnant presents with fatigue, weight loss, heat intolerance, palpitations; PE shows diffusely enlarged thyroid; Labs show low TSH, high free T4 – best treatment?
b blockers + PTU
Why should MMZ be avoided during pregnancy?
May cause aplasia cutis … (loss of fetal scalp)
2 indications for surgical resection in patient with Graves Disease?
Patients with cold nodules; Previous radioactive treatment
Alternate name for Hashimoto thyroiditis?
Chronic lymphocytic thyroiditis
Alternate name for Subacute granulomatous thyroiditis?
De Quervain thyroiditis
Distinguishing feature of De Quervain thyroiditis?
Tender thyroid
1st step of workup for thyroid nodule?
TSH levels
2nd step of workup for thyroid nodule?
Radioactive scan
Best treatment for hot thyroid nodule?
Radioactive iodine
Best treatment for cold thyroid nodule?
FNA … increased likelihood of CA