[A case of retroperitoneal malignant lymphoma successfully treated by chemotherapy].

A 71-year-old woman was admitted to our hospital with the complaint of lower abdominal pain. CT scan revealed a huge retroperitoneal mass. On laparotomy the tumor was found to have extensively invaded the retroperitoneum, and an incisional biopsy was performed. Histopathological diagnosis of the biopsied specimen demonstrated diffuse malignant lymphoma of the pleomorphic type. Six cycles of CHOP chemotherapy were very effective for complete remission. Our review of 18 cases in the Japanese literature showed that chemotherapy and radiotherapy were effective for retroperitoneal malignant lymphoma, so due care must be taken in opting for surgery.