Nonfunctioning adrenal pheochromocytoma incidentally discovered associated with renal oncocytoma

Pheochromocytoma (PHEO), a rare catecholamine-producing tumor, is a disease entity with variable clinical manifestations. The classic triad of symptoms are palpitations, headaches, and diaphoresis, but the signs and symptoms are wide ranging and mainly reflect the hemodynamic and metabolic actions of the catecholamines produced and secreted by the tumor. We describe the rare case of a patient affected by nonfunctioning and asymptomatic PHEO associated with the incidental discovery of renal oncocytoma, and review the literature.