Objectives: To further refine the extent of deletion on chromosome gp21-22 in nasopharyngeal carcinoma (NPC) and clone a new putative tumor suppressor gene associated with NPC.

• 目的：进一步精细限定鼻咽癌9p21－22区域等位基因杂合性丢失的频率和范围，筛选和克隆其共同缺失区内鼻咽癌相关的候选抑瘤基因。