流行病学调查显示,结肠直肠癌的发病率和死亡率在全球癌症发病谱中居第3位。尽管结肠直肠癌的早期诊断有利于病人接受根治性手术治疗,但仍有40%~50%的病人最终出现局部复发和(或)远处转移[1],而远处转移是导致病人死亡的主要原因。结肠直肠癌最常见的转移部位为肝脏、腹部淋巴结以及肺部[2-3]。中国抗癌协会大肠癌专业委员会于2008年起开始制定《结直肠癌肝转移诊断和综合 Epidemiological surveys show that the incidence and mortality of colorectal cancer ranked third in the global cancer incidence spectrum. Although early diagnosis of colorectal cancer favors patients undergoing radical surgery, 40% to 50% of patients eventually develop local recurrence and / or distant metastasis [1], whereas distant metastases cause the patient to die main reason. The most common metastatic sites of colorectal cancer are the liver, abdominal lymph nodes, and lungs [2-3]. Chinese anti-cancer Association of Colorectal Professional Committee started in 2008 to develop "diagnosis and synthesis of colorectal cancer liver metastases