多原发恶性肿瘤(Multiple Pri mary Malignant Neoplasm简称MPMN或MPC)是指同一宿主的不同器官同时或异时发生两种或两种以上的原发恶性肿瘤。在2个月以内发生者为同时性,2个月以上为异时性。多原发癌的治疗与复发癌的治疗有原则上的区别,前者与第一原发癌一样,随病种、病期采 Multiple primary Malignant Neoplasm (MPMN or MPC) refers to two or more primary malignancies occurring simultaneously or heterochronously in different organs of the same host. Within two months, those who occur simultaneously, more than two months as heterosexual. Multi-primary cancer treatment and recurrence of cancer treatment in principle, the difference between the former and the first primary cancer, with the disease, disease-mining