PHAEOCHROMOCYTOMA-TUMOR OF ADRENAL MEDULLA

It is a tumor of sympathetic nervous system and rare neuro endocrine tumors. 90% are present in adrenal medulla. 10% are extra adrenal called as PARAGANGLIOMAS. They are catecholamine secreting tumors and account for less than 0.1% cases of hypertension. Most of them are benign but about 15% show malignant transformation.