肿瘤的家族聚集现象是指家族性癌、癌家族及双生子癌瘤。对于这方面的研究早在国外1895年开始。 研究肿瘤的家族聚集现象的目的在于能及早发现癌瘤的易感个体,便于预防及早期治疗。且对肿瘤的病因及发病学的研究亦有重要意义。据目前所知有关瘤的家族聚集现象可用环境因素、遗传因素或两者来 The family clustering of tumors refers to familial cancers, cancerous families, and twin cancers. Research in this area began as early as 1895 abroad. The purpose of investigating the familial clustering of tumors is to identify susceptible individuals with early detection of cancer and to facilitate prevention and early treatment. The study of the etiology and pathogenesis of tumors is also of great significance. According to the current knowledge about the family clustering of tumors, environmental factors, genetic factors or both can be used