[Extra adrenal pheochromocytoma. Report of two cases]. / Feocromocitoma extraadrenal. Presentación de dos casos.

OBJECTIVES: To review two cases of extra adrenal pheochromocytoma. METHODS: We present two cases: a 75-year-old patient with history of high blood pressure and intravesical tumor compatible with urinary bladder paraganglioma, and a 59-year-old patient with a retroperitoneal tumor arising from para-aortic ganglia. RESULTS: Diagnosis was made by CT scan and transurethral resection in the first case, all posterior extension studies were negative; in the second case retroperitoneal exeresis surgery was performed after CT scan. CONCLUSIONS: Extra adrenal pheochromocytomas are catecholamine producing tumours, which determines their clinical features; treatment should be surgical. A bibliographic review about this disease is performed.