On 180 Biopsies of Oral Carcinomas in

Carcinomas in the oral region, like those found in other regions of human body, have differences owing to sex, age, spot of primary origin, etc., in terms of their frequency. Observations of these differences are, therefore, full of significance not only from a clinical point of view as providing an exact diagnostic tool, but also from a pathological standpoint in that it makes clear peculiarities of various types of the oral carcinomas. Another significance of these observations lies in our better understanding of preventive measures against the oral carcinomas and the determination of histologic types of them is also meaningful. From these considerations, the authors collected 312 tumor cases during 14-year biopsies from August 1952 to December 1966 in the Department of Pathology, Nihon University School of Dentistry, and of them a selection was made of 180 which were malignant epithelial tumors for observation purposes here. These specimens were statistically treated in terms of a) frequency, b) sex, c) age, d) spot of origin, histologic types and so forth. The present study may prove worthwhile to acquaint the oral surgeons and general clinicians with the data regarding the incidence of oral carcinomas in the Japanese.