[Combined Resection of the Superior Mesenteric Vein and Revascularization for Cecal Cancer with Extensive Invasion and Tumor Thrombosis in the Superior Mesenteric Vein-A Case Report].

The patient was a 76-year-old woman. When she visited a nearby clinic for pedal edema and palpitations, she was found to have severe anemia, which led to a referral to our hospital. Cecal cancer with regional lymph node metastasis and tumor thrombosis in the superior mesenteric vein were diagnosed. However, because no distant metastasis was detected, extended right hemicolectomy was performed. Only the first jejunal vein was preserved because the tumor thrombosis extended from the ileocolic vein to the superior mesenteric vein, and complete(R0)resection was achieved. When ileocolic anastomosis was performed, marked edema was detected in the ileum. Thus, the last branch of the ileal vein and the right ovarian vein were anastomosed to complete the surgery. Although liver metastasis occurred in the early postoperative period, she was placed under wait-and-see observation according to her request. She died of hepatic failure 1 year and 8 months later. In this case of cecal cancer with extensive invasion and tumor thrombosis in the superior mesenteric vein, we performed combined resection of the superior mesenteric vein and revascularization. A survival time of 1 year and 8 months was achieved by resection alone. This case suggests that combined resection of the superior mesenteric vein together with revascularization may be an effective treatment strategy for advanced colorectal cancer with invasion and tumor thrombosis in the superior mesenteric vein.