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多原发性肿瘤是指在同一患者的单个或多个组织器官同时或先后发生两种或两种以上的原发性恶性肿瘤,亦称重复癌。临床上根据其发生的时间分为同时性(6个月以内)和异时性(6个月以上)。笔者自1993年6月至1998年6月共遇到12例,现报道如下。
Multiple primary tumors refer to the simultaneous or sequential occurrence of two or more primary malignancies, also known as repeated cancers, in one or more tissues and organs of the same patient. Clinically according to the time of its occurrence is divided into simultaneous (within 6 months) and heterochronic (6 months). The author from June 1993 to June 1998 a total of 12 cases are reported as follows.