Pheochromocytoma is a tumour of the:: (A) Adrenal cortex, (B) Parathyroids, (C) Pituitary, (D) None of the above
Answer is D. Most adrenal medullary tumors (pheochromocytomas) secrete norepinephrine or epinephrine or both and produce sustained hypertension.
Pheochromocytoma is a tumour of the adrenal medulla.
Reference: Ganong’s Review of Medical Physiology T W E N T Y - F I F T H   E D I T I O N page no 356