抄録
An ossifying fibroma of the maxillary sinus appeared in a 10-year-old male with painless slow enlargement of the right maxilla. Clinical examinations and routine paranasal sinus X-rays disclosed an expansile mass in the right maxilla. A CT-scan provided the best preoperative information as to the localization of the tumor. At exploration, the tumor was well capsulated, so complete resection was possible. The pathologic diagnosis was ossifying fibroma. The postoperative course was uncomplicated. Scar tissue with foreign body reaction was found, but there was no recurrence of the tumor.
