多原发恶性肿瘤已有大宗病例报道。本文报告25例,其临床资科见附表。 讨论 一、分类与诊断:本病分同时与异时两种。本组同时7例,异时18例,与文献报告相似。按1973年Lund提出的意见,多原发恶性肿瘤分三类:一是多中心源性;二是不同器官或组织;三是多中心源加另一个不同组织的多原发癌。本组三类分别为13、10、 Multiple primary malignancies have been reported in a large number of cases. This article reports 25 cases. See the appendix for its clinical resources. Discussion First, classification and diagnosis: The disease is divided into two kinds at the same time. There were 7 cases in this group and 18 cases in different time, similar to the literature reports. According to Lund’s opinion in 1973, multiple primary malignancies fall into three categories: one is multi-centered; the second is different organs or tissues; and the third is multi-center cancer plus multiple different tissues. The three categories of this group are 13, 10, respectively.