All are involved in MEN IIA except:: (A) Pituitary, (B) Parathyroid, (C) Thyroid, (D) Adrenal
Answer is A. a. Pituitary(Ref: Nelson's 20/e p 2694-2481, Ghai 8/e p 523)In Multiple Endocrine Neoplasia (MEN) IIA, features seen are: "HAPPY", i.e. Hirschsprung disease, Amyloidosis, Pheochromocytoma, Parathyroid hyperplasia/Adenoma and thyroid Carcinoma (Medullary).