The positive rate of telomerase acti vity was 90.7%in biopsy specimens from 43 cases diagnosed as nasopharyngeal c arcinoma (NPC) and 6.7%in those from 15 cases of chronic nasopharyngitis.

• 43例鼻咽癌确诊患者标本的该酶阳性率为90.；7%25，15例鼻咽部慢性炎症（对照组）标本的该酶阳性率为6