Objective To explore the expression of LKB1 and its clinical significance in the radiotherapy of undifferentiated nasopharyngeal carcinoma.Methods The expression of LKB1 protein was detected in 65 patients with undifferentiated nasopharyngeal carcinoma by SP immunohistochemical method,and the patients were divided into positive group and negative group according to the expression of LKB1.The parameters of age,sex,positive rate of EB virus and distant metastasis were recorded in both groups.Four weeks after ...