Pheochromocytoma - Symptoms and causes - Mayo Clinic

Pheochromocytoma - Symptoms and causes - Mayo Clinic: ″A pheochromocytoma (fee-o-kroe-moe-sy-TOE-muh) is a rare tumor that grows in an adrenal gland. Most often, the tumor is not cancer. When a tumor isn't cancer, it's called benign.″