J Korean Assoc Oral Maxillofac Surg.
2008 Apr;34(2):141-150.
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
- Affiliations
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- 1Department of Dentistry and Oral Surgery, Division of Surgery, Osaka Medical College, Japan. ora009@poh.osaka-med.ac.jp
- 2Oral and Maxillofacial Surgery, Department of Oral Restitution, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University, Japan.
- 3Oral & Maxillofacial Surgery, Department of Cell & Tissue Biology, Division of Cancer Medicine, Kanazawa University, Graduate School of Medical Science, Japan.
- 4First Department of Oral and Maxillofacial Surgery, School of Dentistry, Iwate Medical University, Japan.
- 5Department of Oral and Maxillofacial Surgery, Tokyo Medical University, Japan.
- 6Department of Oral and Maxillofacial Surgery, Dokkyo University School of Medicine, Japan.
- 7Department of Oral and Maxillofacial Surgery, Wakayama Medical University, Japan.
- 8Department of Oral & Maxillofacial Surgery, Sensory and Motor Organ Sciences, Faculty of Medical and Pharmaceutical Sciences, Kumamoto University, Japan.
- 9First Department of Oral and Maxillofacial Surgery, School of Dental Medicine, Tsurumi University, Japan.
Abstract
- We studied 1809 oral cancer patients 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 is composed of 39 dental university hospitals, 44 medical university hospitals, 64 general hospitals, and 1 unknown institution. The patients consisted of 1071 (59.2 %) males and 738 (40.8 %) females (male:female ratio, 1.45:1), who had a mean age of 65.2 years old. 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. In histopathological examinations, squamous cell carcinoma (88.7 %) was the most common type found, followed by adenoid cystic carcinoma (2.1 %), and mucoepidermoid carcinoma (1.7 %). In addition, non-epithelial tumors comprised 1.8 % , among which malignant melanoma was the most common type. Cases classified as T2N0 were the most common (32.1 %), followed by T1N0 (21.4 %), T4N0 (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 7.0 cm, with a mean size of 3.7 cm.
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