最近の 5 か年間における口腔腫瘍の臨床的観察 : 口腔悪性腫瘍について

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  • A Clinical Analysis of the Oral Neoplasms in Our Clinic during the Past 5 Years : Malignant Tumors in Oral Cavity

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The movement of 83 cases diagnosed as malignant tumors in the Second Department of Oral Surgery, Kyushu Dental College Hospital, during the period from 1978 to 1982, were clinically analysed. The following results were obtained. 1) A series of 83 cases of malignant tumors in oral cavity has been reported. Its incidence was seen in 1.1% of outpatients, in 8.5% of inpatients and in 40.5% of the patients with oral neoplasm. Through the period from 1973 to 1982, there was increasing in number. 2) The malignant tumor in the majority of 83 cases was located on the tongue (27.7%), but occurred with lesser frequency on the gingiva of the mandible (19.3%), the gingiva of the maxilla (16.9%), the hard palate (16.9%), the floor of the mouth (9.6%), the buccal mucosa (7.2%), the lip and the submandibular region (1.2%). Through the period from 1973 to 1982, there was decreasing in number in the gingiva of the maxilla, but there was increasing in number in the gingiva of the mandible and the buccal mucosa. 3) Of the malignant tumors (83 cases), 43 cases (51.8%) were between 50 and 60 years of age (the average 60.2 years). However, during the period from 1973 to 1977, the average was 63.0 years. 4) As to the incidence by sex, the incidence of malignant tumors was slightly higher in males. Through the period from 1973 to 1982, there was no change in the movement. 5) This series was found histopathologically to be ; carcinoma was 90.4%, sarcoma was 4.8% and malignant melanoma was 4.8%. Of the carcinoma (75 cases), squamous cell carcinoma was 81.3%, mucoepidermoid carcinoma was 5.3%, adenoid cystic carcinoma was 4.0%, carcinoma simplex was 2.7% and adeno carcinoma was 1.3%.

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