thyrotropin-releasing hormone (TRH) stimulation test

thy·ro·tro·pin-re·leas·ing hor·mone (TRH) sti·mu·la·tion test

(thī'rō-trō'pin rĕ-lēs'ing hōr'mōn stim'yŭ-lā'shŭn test)
A test of pituitary response to injection of thyrotropin-releasing hormone, which normally stimulates pituitary secretion of thyroid-stimulating hormone (TSH, thyrotropin); used primarily to distinguish pituitary from hypothalamic causes of thyroid disorders; TSH does not rise in cases of pituitary dysfunction, but does rise in cases of hypothalamic disorders.
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