抄録
Clinical reports were made on five cases that arose in the maxilla within 104 cases of the ameloblastoma which were diagnosed in the First Department of Oral and Maxillofacial Surgery of Osaka Dental University during 16 years from 1968 to 1983. Age of the patients ranged from 30 to 79 years old. Mean age was 53.4 years and significantly higher than the mean age of the ameloblastoma in the mandible (32.3 years old). Three cases were male and two were female. Two cases involved maxillary tuberosity and a case in anterior region. Two cases included the border between the anterior and molar region. Histologically, tumors showed the atypical form of ameloblastoma like acanthomatous metaplasia. Stroma was the dense fibrous tissue. Radiographic examination disclosed varied appearance types (three unilocular, one multilocular, and one soap bubble-like). Concerning three operated cases, two cases of partial maxillary resection had good clinical courses but a case of enucleation of the tumor recurred two years later.
