虽然外科手术在大肠癌的治疗中仍处主导地位，但可手术切除的病变其5年生存率依旧徘徊在50％～60％，局部复发和远处转移仍是治疗失败的主要原因。按照肿瘤分期、组织学类型以及发生部位的不同，复发率可占20％～50％不等。寻求和探索提高局部控制率与减少转移发生率的有效综合 Although surgical operation is still dominant in the treatment of colorectal cancer, the 5-year survival rate of resectable lesions remains at 50% to 60%. Local recurrence and distant metastasis are still the main reasons for treatment failure. The recurrence rate may vary from 20% to 50% depending on the stage of the tumor, the type of histology, and the site of its occurrence. Seek and explore effective synthesis to increase local control rate and reduce transfer rate