Histological examination of 500 cases of oral tumorous lesions in Nara.

概要

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Histology and brief clinical data in 500 oral tumor cases were reviewed and compared to those reported from Japanese and western institutes: they were admitted to the Department of Oral and Maxillofacial Surgery, Nara Medical University during 1981-1990.<BR>The lesions were divided into 3 groups: non-odontogenic tumors (450 cases, 90%), odontogenic tumors (24 cases, 4.8%), and major salivary gland tumors (11 cases. 2.2%). Four hundred and fifty cases of non-odontogenic tumors were classified as non-neoplasia (46%), malignant (28%) and benign (14%) neoplasias, and dysplastic epithelium (11%). Male to female ratio and mean age in cases with non-neoplastic lesions, benign tumors, dysplastic epithelium, and malignant tumors was 1: 1.9 and 49 years, 1: 1.5 and 39 years, 1.1 and 61 years, and 1.8: 1 and 63 years, respectively. Tongue was the most frequent site for cancers (32% of all cases) followed by floor of the mouth (15.4%), gingiva (14.5%), and maxillary sinus (12. 8%). Sites of epithelial dysplasia were tongue (65%), cheek mucosa (18%, ), gingiva (8%) and so on. The results of present study at Nara review of literature suggested that no remarkable differences were present in sex ratio, age, site of lesions, and histologic types among oral tumor cases in Japan and Western countries.
社団法人日本口腔外科学会の論文