随着医学科学的发展,肿瘤诊疗技术的提高,多原发癌已成为引人注目的临床问题。但在日常诊疗工作中,多原发癌往往被认为某一原发性肿瘤的转移或复发而贻误诊断,放弃治疗。为了提高对该病的认识,本文通过临床实例,结合文献资料,就多原发癌的有关问题作简要讨论。 With the development of medical science and the improvement of cancer diagnosis and treatment techniques, multi-primary cancer has become a compelling clinical problem. However, in the daily diagnosis and treatment work, multiple primary cancers are often considered as metastases or recurrences of a primary tumor, which leads to delayed diagnosis and abandon treatment. In order to improve the understanding of this disease, this article briefly discusses the issues related to multiple primary cancers through clinical examples and literature data.