小脳橋角部原発性脈絡叢乳頭腫の1例

Primary Choroid Plexus Papilloma presenting as a Cerebellopontine Angle Mags Lesion

I．はじめに

　小脳橋角部唾瘍はほとんどが良性腫瘍であり，70％あるいはそれ以上を聴神経鞘腫が占めるとされているが^4,18），稀な腫瘍または血管腫も存在するために，CT診断が日常化した現代でも鑑別は必ずしも容易ではない．著者らは頭痛発作のみで他に何ら神経症状を伴わない小脳橋角部脈絡叢乳頭腫の1例を経験したので，若干の文献的考察を加えて報告する．

A rare case of primary choroid plexus papilloma of the cerebellopontine angle, which might have been originated from the lateral choroid plexus of the fourth ventricle and proliferated into the extraventricular space, is reported. The patient had no neurologi-cal abnormalities except for recurrent episodes of headache. Although radiological examinations did not offer a definitive diagnosis, he was successfully treated by operation without any neurological deficit.

So far reported in the literature, the number of such cases is less than twenty, and the prognosis has been reported not so good despite benign biological nature.