[A case report of poorly-differentiated adenocarcinoma in sigmoid colon cancer with liver and pulmonary metastasis responding to TS-1 and CPT-11].

A 66-year-old woman (156 cm, 58 kg) underwent sigmoid colectomy for cancer. She was found to have simultaneous liver and peritoneal metastases at operation, which had not been detected with CT examination before operation. After operation, CT showed multiple liver metastasis and a high level of CEA and CA19-9 . Pathological findings were type 3, 30 x 20 mm, poorly-differentiated adenocarcinoma, se, ly 2, v 2, n 2 (+), ow (-), aw(-), H 3, P 0 (stage IV). Treatment of the patient consisted of daily oral administration of 80 mg TS-1 for 21 days and 60 mg CPT-11 on 1 day and 15 day as one course. After 2 courses, tumor sizes of liver metastases and the level of tumor markers became reduced. The current case suggested that the administration of TS-1 and CPT-11 may have a potent therapeutic efficacy in advanced colorectal cancer.