<prompt> Pheochromocytoma is the disease of:Pituitary glandAdrenal medullaPancreasAdrenal cortex  <response>: b. Adrenal medullaRef: Nelsons 20e p 2227-2729, Ghai 8e p 525Pheochromocytoma is a neoplasms of chromaffin cells in medulla that release catecholamines. 