最近経験せる上顎洞骨膜性線維腫症について

　I．緒言

　私は最近，上顎洞の骨膜性線維腫症を経験したので茲に報告する。

A boy aged 15 showed a swelling of the right cheek the size one half the size of hen's egg. X-ray examination revealed bony destructio-ns in the maxilla. The patient was operated upon ; bony destructions were recognized in the anterior wall and roof of the maxillary sinus while its medial wall showed scattered spots of bony sequestrations. Microscopic ex-amination revealed the affection to be a peri-oteo-fibroma.