2002年度(社)日本口腔外科学会指定研修機関を受診した顎口腔領域の悪性腫瘍に関する疫学的研究 [in Japanese] Epidemiological study of malignant tumors in the oral and maxillofacial region - Survey of member institutions of the Japanese Society of Oral and Maxillofacial Surgeons, 2002 [in Japanese]
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We studied 1809 patients with oral cancer who visited and were treated in 2002 at the 148 institutions certified as training facilities by the Japanese Society of Oral and Maxillofacial Surgeons, which comprise 39 dental university hospitals, 44 medical university hospitals, 64 general hospitals, and 1 unknown institution. The patients were 1071 (59.2%) males and 738 (40.8%) females (male: female ratio, 1.45: 1), who had a mean age of 65.2 years. The tongue (40.2%) was the most common site affected, followed by the gingiva (32.7%), buccal mucosa (10.1%), and oral floor (9.0%). There were 6 cases of intraoral multiple cancer. Histopathologically, squamous cell carcinoma (88.7%) was the most common type, followed by adenoid cystic carcinoma (2.1%), and mucoepidermoid carcinoma (1.7 %). Non-epithelial tumors comprised 1.8% of the total, among which malignant melanoma was the most common type. Cases classified as T2NO were the most common (32.1%), followed by T1NO (21.4%), T4NO (8.0%), and T2N1 (7.6%). Distant metastasis occurred in 17 patients (1.0%). The sizes of the non-epithelial malignant tumors ranged from 1.0 to 7.0cm, with a mean size of 3.7cm.
- Journal of Oral Surgery Society of Japan
Journal of Oral Surgery Society of Japan 52(7), 401-410, 2006-07-20
Japanese Society of Oral and Maxillofacial Surgeons