Abstract
One hundred sixty-six cases of intraoral minor salivary gland tumors, histologically diagnosed at the Department of Oral and Maxillofacial Surgery, Hokkaido University School of Dentistry from August 1967 to July 1992, were reviewed and clinically analyzed.
The results were as follows:
1. Benign tumors were 60.8 %, and malignant tumors were 39.2 %.
2. The palate was the most common site, being 62.7 % of all sites.
3. Pleomorphic adenoma were most common, being 59.0 % of all tumors and 97.0 % of benign tumors.
4. Mucoepidermoid carcinoma and adenoid cystic carcinoma were common malignant tumors, being 31.4 % of all tumors and 80.0 % of malignant tumors.
5. Both benign and malignant tumors occurred more frequently in women (60.4 %) and (58.5 %) than men (39.6 %) and (41.5 %) respectively.
6. The average ages were 44.2 years in patients with benign tumor and 53.7 years in patients with malignant tumor. Benign tumors were distributed evenly in all generations, but most malignant tumors occurred in the middle-aged and elder patients.
7. The incidences of pain, ulcer formation, and tumors of 41mm or larger were high in cases of malignant tumors.
8. There were high incidences of malignant tumor in the floor of the mouth, retromolar area, alveolus and tongue.
