Abstract
A 72-year-old man was admitted because of right hypochondralgia. A tumor in the right retroperitoneal space was revealed by abdominal ultrasonography, CT and MRI. Blood pressure was normal (140/86 mmHg) before operation, but during operation, systolic blood pressure suddenly rose to 240 mmHg. At this time, it was suspected that the tumor was an ectopic pheochromocytoma. Histological findings showed pheochromocytoma and bilateral normal adrenal glands were visualized on postoperative131I-adosterol scintigraphy.
