Physiology All India exam cb930e60 True about pheochromocytoma is A Arises from chromaffin cells of adrenal medulla B Bilateral in 20% of all cases C Hypotension rules out pheochromocytoma D Almost always a malignant tumor High-Yield Explanation 10% are bilateral 10% are malignant 10% occur in pediatric patients 10% are extra-adrenal 10% are familial