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结直肠癌肝转移极为常见,估计全世界每年至少有60万例结直肠癌肝转移,我国至少10万例发生。在确诊结直肠癌时已有20%～25%有肝转移;在原发灶治疗后,异时性肝转移发生率多达50%;尸检中,结直肠癌肝转移高达60%～71%。发生肝转移后自然生存时间(即未经治疗的肝转移患者生存时间)不长。Foster报告结直肠癌孤立性肝转移平均生存
Colorectal cancer is extremely common liver metastases, it is estimated that at least 600,000 cases of colorectal liver metastases worldwide each year, at least 100,000 cases occurred in our country. In the diagnosis of colorectal cancer has been 20% to 25% of liver metastases; after primary treatment, the incidence of heterotopic liver metastases up to 50%; autopsy, colorectal liver metastases up to 60% to 71% . The time to spontaneous survival after liver metastases (ie, survival of untreated liver metastases) is not long. Foster reports colorectal cancer solitary liver metastases average survival