Collision neoplasm is a rare clinical disease which characterized by the existence of two distinct neoplasms emerging in the same anatomic location,It almost occured in any part of the body. Case reports of collision neoplasm is relatively few.There is no domestic relevant summary.The author read the reports in recent five years in the pubmed database,WANFANG data and CNKI to point out the location,common pathological types of collision tumor,pathogenesis and so on. Aim to help us better understand collision tumor.%碰撞瘤属于临床罕见病,是指两种独立起源的原发性肿瘤相互碰撞或相互浸润,几乎可以发生在身体的任何部位.关于碰撞瘤的个案报道相对不多,国内尚无相关综述总结.笔者在pubmed、万方、中国知网等数据库阅读近5年相关国内外病例的报道,对碰撞瘤的好发部位、常见病理类型、发病机制等展开综述,旨在帮助我们更好的了解和认识碰撞瘤.
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