结直肠癌又称大肠癌,在西方国家占肿瘤死亡的第2位,发病率为5 6 1/ 10万。我国结直肠癌发病率约为2 0 6 / 10万,占肿瘤死亡的第5位。肝转移是结直肠癌主要的死亡原因之一,约有5 0 %的结直肠癌最终发生肝转移。同时性肝转移约有15 %～2 5 % ,异时性肝转移为2 0 %左右。不经治 Colorectal cancer, also known as colorectal cancer, accounts for the second leading cause of cancer death in western countries with a prevalence of 561,000. The incidence of colorectal cancer in China is about 206,000, accounting for the fifth death of cancer. Liver metastasis is one of the major causes of death from colorectal cancer, and about 50% of colorectal cancers eventually undergo liver metastases. At the same time, about 15% ~ 25% liver metastases, heterotopic liver metastases 20%. Without treatment