结直肠癌是美国肿瘤相关死亡的第二位最常见的恶性肿瘤 ,在初次诊断时约 2 0 %患者有转移病变 ,原发肿瘤根治性切除后高达 4 0 %的患者有局部复发或转移播散。不加治疗 ,绝大多数复发或转移患者将在 2年内死亡。只要行完整切除 ,一些有肝、腹腔、盆腔或肺转移的患者将从中受益 Colorectal cancer is the second most common malignancy of cancer-related death in the United States, with about 20% of patients having metastatic disease at initial diagnosis, and up to 40% of patients with locally advanced or metastatic disease after radical resection of the primary tumor Scattered Without treatment, the vast majority of patients who relapse or metastasis will die within 2 years. As long as the complete resection, some patients with liver, abdominal, pelvic or lung metastases will benefit from