随着对癌瘤诊疗水平的不断提高,癌瘤病人的寿命普遍延长,因而发生另一个癌瘤的机会也就随之增加。由于各国医疗水平不同,多原发癌的检出率存在一定的差异,因而对多原发癌的发生率难以进行准确的统计。从1965年起沈镇宙等先后报告多原发癌532例,其发生率0.43～0.81%,最高达8.1%,本文6例发生率占0.77%;国 With the continuous improvement in the level of diagnosis and treatment of cancer, the life expectancy of patients with cancer is generally prolonged, so the chance of developing another cancer will increase. Due to the different medical levels in different countries, there is a certain difference in the detection rate of multiple primary cancers, and it is difficult to accurately count the incidence of multiple primary cancers. Since 1965, Shen Zhenzhou has reported 532 cases of multiple primary cancers, with an incidence rate of 0.43 to 0.81% and a maximum of 8.1%. The incidence of this case in 6 cases was 0.77%;