Pheochromocytoma occurs in the Nervous System and in the Adrenal Gland.

Pheochromocytoma is a rare tumor of the adrenal glands that produces adrenaline. There are approximately 1,000 new cases of pheochromocytoma tumors in the United States each year.

The adrenal gland

If a pheochromocytoma is suspected, urine and/or a blood test are usually recommended. A test called "24-hour urinary catacholamines and metanephrines" will be done.

Localized benign pheochromocytoma means that the tumor is found only in one area, is not cancer, and cannot spread to other tissues of the body