Abstract: Objective To analyze the prevalence and distributing feature of oral malignant tumor in Nanjing and its surrounding areas, so as to provide reference for the prevention and treatment of oral malignant tumor.Methods 1 267 cases of oral malignant tumor treated from 2010 to 2013 in Nanjing Stomatological Hospital were collected and analyzed. Results The average age of 1267 cases was 60.94 years old, and the incidence rate of male was higher than that of female, which was 1.3∶1.0. Males also had a longer smoking and drinking history than females. The high risk age was 60-69 and over 70 years old. Males at 60-69 years old and females over 70 years old suffered from the highest incidence rate. There was a significant difference between different ages (P<0.001). The most common oral malignant tumor was oral cancer, in which the most common was squamous cell carcinoma with the rate of 64.56% (818 cases). The most common site was tongue (27.55%), followed by buccal, gingiva, soft and hard palate, jaw, salivary glands. The percentage of oral ulcer, oral mucosal lesions and dental disease was 73.56% (932 cases). Conclusions The prevalence of male patients with oral malignant tumor was higher than female in Nanjing Stomatological Hospital. The high risk age was over 60 years old, and the most common oral cancer was squamous cell carcinoma, which suggests that oral health care of old people should be strengthened.

Key words: oral malignant tumor, oral cavity cancer, statistical analysis, Nanjing