随着恶性肿瘤诊治水平的不断提高,患者远期生存率普遍上升,生存期延长,发生多原发癌的机会随之增加。同时,随着诊断手段的更新,发现更多的多原发癌,对多原发癌的研究日益受到人们的重视。现对多原发癌的发病率、发病机理、好发部位、诊断、治疗及预后作一综述。多原发癌(multip With the continuous improvement of the diagnosis and treatment of malignant tumors, the long-term survival rate of patients generally increases, the survival period is prolonged, and the chance of occurrence of multiple primary cancers increases. At the same time, with the update of diagnostic methods, more and more primary cancers have been found and more and more attention has been paid to the study of multiple primary cancers. Now more than the incidence of primary cancer, pathogenesis, the site of a good diagnosis, treatment and prognosis are reviewed. Multiple primary cancers (multip