Pheochromocytoma is a neoplasm derived from: (A) Chromaffin cells, (B) Paraganglia in neck, (C) An adrenal gland tumor due to nephrogenic rest, (D) Primitive totipotential cells
Answer is A. Pheochromocytomas are neoplasms composed of chromaffin cells, which synthesize and release catecholamines and in some instances peptide hormones. Pheochromocytomas that develop in extra-adrenal paraganglia are designated paragangliomas Robbins 9e pg: 1134 Ref img