[A Case of Early Rectal Cancer Recurring as Liver Metastasis Nine Months after ESD]

A 70-year-oldwoman underwent colonoscopy as a follow-up examination for colon polyps, during which early-stage rectosigmoid cancer was detected. Endoscopic submucosal dissection(ESD)was performed to remove this lesion. Additional radical anterior resection was recommended according to the histological findings but the patient chose to undergo observation. Nine months after the ESD, the patient decided to undergo additional surgical resection: a CT scan revealed liver metastasis in S6. Laparoscopic anterior resection andpartial resection of S6 of the liver was performed. Histological analysis showed no residual cancer in the rectosigmoid, no lymph node metastasis, and liver metastasis in S6. Carcinoma cells were exposed on the radial margin of the liver. After surgery, oral UFT/LV chemotherapy was administered for 6 months. The patient remains free of recurrence 4 years and6 months after the surgery.