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Step 2: Endo3
Endo 3
Question | Answer |
---|---|
hypoglycemia caused by non-B cell tumors excrete _________ | IGF-2 |
(T4/T3) is converted to (T4/T3) in serum. Which is more potent? | T4-->T3 in serum. T3 is more potent (T4 has a shorter half life) |
Name scenarios in which TBG increases. In which it decreases. What is affect on Total T4, and free T4? | increased: pregnancy, OCPs. decreased: nephrotic syndrome, androgen use. Total T4 is affected by TBG, free T4 is not |
How does stress affect TRH release from hypothalamus? | it inhibits release (Stress-->less thyroid activation) |
Which has feedback on TSH release: T3 or T4? | T4 |
MCC of hyperthyroid? | Graves |
Rx of choice for hyperthyroidism (including Graves)? What do you give as first line Rx in pregnant hyperthyroid pt? | Radio iodine ablation. pregant= give PTU/MTM |
Why are elderly hyperthyroid pt's not given radioablation as first line Rx? | b/c radio therapy causes initial increased thyroid release from dying cells (so can exacerbate heart problems) |
HTN of thyrotoxicosis is caused by ________________ circulation. | hyperdynamic circulation (increased systolic pressure d/t increased contractility) |
What is suspected if a pt taking PTU/Methimazole has fever and sore throat? What is the next step in this pt? | agranulocytosis. Stop PTU/MTM immediately, put pt on ABx and GCSF and check WBCs |
Painful goiter is usually _________. Rx for this? | Subacute (de Quirvian) thyroiditis. Usually self limited |
What is Jodd Bastow phenomenon? | Iodine Rx causing hyperthyroidism |
Majority of thyroid nodules are ? | benign colloid nodules |
MCC of hypothyroid | Hashimotos |
anti-TPO, anti-microsomal ABs, anti-thyroglobulin are all found in ? | Hashimotos |
Hashimotos shows a (hot/cold) thyroid scan | cold |
What sign does a hashimotos lymphoma possibly show on CT of neck? | Donut sign around trachea |
What type of pattern does hashimotos show on microscopy | pseudocystic |
what is the MCC of thyroid carcinoma | Papillary carcinoma |
Psamomma bodies are in which Thyroid carcinoma? | Papillary carcinoma |
Which Thyroid CA has increased calcitonin levels | Medullary carcinoma |
Which thyroid CA has the worst prognosis? | Anaplastic |
What is the prognosis in medullary CA of thyroid? | Good |
Orphan annie nuclei are in which thyroid ca? | Papillary Ca |
painless thyroiditis is found in what pts? | pregnant |
What is the next step if MEN syndrome is suspected? | DNA test to confirm, then total thyroidectomy |
What chemical imbalance commonly follows thyroidectomy? | hypocalcemia, due to PTH removal |