Objectives:The aim of t his study was to explore th e incidence trend of nasopharyngeal carcinoma in Zho ngshan based on the registered data of new nasopharyngeal carcinoma p atients du ring 1970-1999,and to pre dict its incidence level in the near future (such as 2001),to provide scientific foundation f or anti-cancer program me in Zhongsh an.Methods :According to the registered data of new nasopharynge al carcinoma patien ts in Zhongshan during 1970-1999,to calculate the crude incidence rate a nd the Wor...