本文报告多原发癌8例(男7例,女1例)。其中双原癌6例,三原癌2例。每例都至少有1种胃肠道癌是其特点。全组末癌与第1癌间时间平均为8.1年。本组除例1和例2分别死于次癌后9年和先发癌6年外,6例均健在,其中已存活4～5年以上者4例。本文强调了多原发癌患者的预后取决于早期诊断和早期治疗。 This article reports 8 cases of multiple primary cancers (7 males and 1 female). Among them, there were 6 cases of bi-protocarcinoma and 2 cases of tri-carcinoma. Each case is characterized by at least one gastrointestinal cancer. The average time between the end cancer and the first cancer in the whole group was 8.1 years. In this group, except for cases 1 and 2, respectively, which died of 9 years after secondary cancer and 6 years of first-line cancer, 6 cases were all alive, and 4 of them had survived for 4 to 5 years. This article emphasizes that the prognosis of patients with multiple primary cancers depends on early diagnosis and early treatment.