Ectopic Cushing's syndrome from a corticotropin-releasing hormone-secreting medullary thyroid carcinoma: a rare pitfall of inferior petrosal sinus sampling.
Vivi-Nelli MäkinenStine Horskær MadsenMette Ji Riis-VestergaardMette BjerreSteen Bønløkke PedersenSylvia L AsaLars RolighedJens Otto Lunde JørgensenMarie Juul OrnstrupPublished in: Endocrinology, diabetes & metabolism case reports (2023)
Medullary thyroid carcinoma may secrete CRH and cause ectopic CS. Ectopic CRH secretion entails a rare pitfall of inferior petrosal sinus sampling yielding a false positive test. Plasma CRH measurements can be useful in selected cases.
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