<prompt> Thyroid carcinoma secreting ACTHFollicular caMedullary caPapillary caAnaplastic ca  <response>: Ans. b Medullary caMedullary Cancer Thyroid: 5 of thyroid cancers Arises from Parafollicular C cells which are derived from Ultimobranchial Bodies. Mc Site is supero lateral C cells secrete CALCITONIN Secretes ACTH, Serotonin, Calcitonin, CEA, Histaminidases, PG E2 and PGF2 Alpha. FNAC showing amyloid is diagnostic 