橋出血で発症した頭蓋内軟骨腫の1例

A Case of Intracranial Chondroma Presenting with Pontine Hemorrhage

I．はじめに

　軟骨腫が頭蓋内に発生することは稀で，全頭蓋内腫瘍の0.1-0.2％といわれている^15,24）．多くは頭蓋底に発生し，腫瘍の増大に伴う脳神経症状を初発症状として発見される．最近われわれは同腫瘍が脳幹に進展し，そこからの出血によって発症するという稀少な症例を経験したので，文献的考察を加え報告する．

A rare case of parasellar chondroma accompanied by pontine hemorrhage is described. A review is made of the previously reported 6 cases of intracranial chondro-mas complicated with hemorrhage.

A 21 year-old woman was admitted to our clinic be-cause of consciousness deterioration progressing to coma within a day, and right hemiparesis. CT scan showed a contrast-enhanced mass in the parasellar re-gion and a hematoma in the brain-stem, which was clearly demonstrated by MRI to be abutted on the dor-sal part of the tumor mass.