Objective:To investigate the distribution of constitutional pattern among NPC cases and their family lines. Methods:Subjects in this survey included 16 cases of untreated NPC patients, 38 cases with NPC survived for more than one year after treatment, 119 members among the family lines of NPC cases, and 98 spouses of members among the family lines surveyed as control. Factors being investigated were composed of constitutional symptoms, family history of cancers, habit of diet and living environment. Then, the data were analyzed to determine their constitutional pattern and to evaluate the rela...