[Effect on neoadjuvant chemotherapy using s-1 for unresectable liver metastasis from rectal cancer-a case report].

The patient was a 42-year-old female who had advanced rectal cancer(Ra, type 2)with liver metastasis. The preoperative diagnosis was T2N1H2, but the liver tumor was unresectable for hepatic vein invasion in September, 2004. She underwent low anterior resection for primary rectal cancer at first after she was given S-1 80 mg/day(14 days)for a histological effect judgment. The pathological diagnosis was moderately-differentiated adenocarcinoma, ss, n1, and the histological effect was Grade 1a. Because CT showed reduction of liver metastasis after the operation, she was treated with 2 courses of chemotherapy using S-1. Radiographic examination showed reduction of liver metastasis(36%)and improvement of hepatic vein invasion. In January, 2005, she underwent hepatectomy and the pathological diagnosis was moderately-differentiated adenocarcinoma, metastasis and the histological effect was Grade 1a. There has not been any recurrence for 48 months after hepatectomy. We experienced this case in which preoperative S-1 proved effective for liver metastasis from rectal cancer.