Question:
What is secondary hypothyroidism?
Author: H KAnswer:
Caused by TSH deficiency, 1% of hypothyroid, causes may be hypopituitarism or others (pituitary tumor, postpartum necrosis (Sheehan), hypophysitis, non-pituitary tumor (craniopharyngioma), infiltrative diseases, inactivation mutation of TSH or TSH receptor) may be isolated TSH deficiency, but more often related w/other hormone deficiency.
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