[Hemangiopericytoma of the stomach]

The case is reported of a 46-year-old man who was succesfully operated for a tumor that had its origin in the greater curvature of the stomach and grew into the gastrocolic ligament. After two false diagnoses (pancreatitis and retroperitoneal tumor) this tumor was histologically identified as a hemangiopericytoma. The possibility of recurrence and its prevention are discussed.