Pheochromocytoma HP:0002666 SNOMEDCT_US:302835009 Pheochromocytomas (also known as chromaffin tumors) produce, store, and secrete catecholamines. Pheochromocytomas usually originate from the adrenal medulla but may also develop from chromaffin cells in or about sympathetic ganglia. A common symptom of pheochromocytoma is hypertension owing to release of catecholamines. Chromaffin tumors UMLS:C0031511 Chromaffin tumours SNOMEDCT_US:399343007 NCIT:C3326 SNOMEDCT_US:85583005 Neuroendocrine neoplasm