巨大な石灰像を示し，精神症状を伴つた若年者脳膜腫の1例

A CASE OF A HUGE PREFRONTAL FALX MENINGIOMA (OSTEOBLASTIC TYPE) WITH PERSONALITY CHANGES IN A JUVENILE FEMALE

I．はじめに

　脳の器質疾患で精神症状が前景に立ち，しかもその経過が長い場合，鑑別診断が往々にして等閑に付されることがある。ここに報告する症例は13歳ですでに不純異性交遊を体験し，不良生徒として施設および精神病院に収容され，交通事故後に行なわれた頭部単純撮影によつて偶然発見された前頭葉の大きなOsteoblastic type　の脳膜腫の一例である

A girl of 15 years old with a large prefrontal falx meningioma was reported. At the age of 12, her parents had become aware of abnormal behavior, such as euphoric, shameless and wanton behavior. She had been placed in an institution for protection and guidance of children and a mental hospital be-cause of sexual looseness and epileptic seizures since 13 years of age. She had met a traffic accident and roentogenologic examinations of her skull had re-vealed an abnormal large calcification about 6 × 6 × 5 cm in size in the prefrontal region, which was thought to be a psammomatous meningioma. Total extirpation of the tumor was performed and patho-logical examination of the tumor proved it to be a large osteoblastic meningioma (115 g) originating from the falx, which had caused marked atrophy of both frontal lobes. The postoperative course was uneventful ; the EEC findings were improved with-out any remarkable change of her abnormal beha-vior.