両側前頭葉内嚢腫—Suprasellar germinomaの一形

Bifrontal Cystic Tumor:A Form of Suprasellar Germinoma

Ⅰ．はじめに

　Suprasellar germinomaは尿崩症，視力視野障害，下垂体前葉機能不全を三主徴として発現すると知られている^13,31）．しかしこれらの症状が明らかでなく，痙攣発作を初発症状として発現した両側前頭葉内にcystを形成する稀なsuprasellar germinomaの1症例を経験したので報告する．

Twenty year old boy was admitted because of a recent history of generalized seizures and papilledema. Neurological examination was essentially negative except papilledema in the both optic fundi. A history of polydipsia or polyuria was not obtained. CT scan showed bifrontal cystic lesions and cyst walls were partly enhanced. Midline frontal nodules around the foramen of Monro were also revealed by enhancement.

Operation was performed and biopsy specimen showed typical histology of germinoma with a small focus of squamous epithets.