下部胸椎〜腰椎腫瘍とうっ血乳頭—脳動脈瘤破裂後の水頭症とまちがえた胸・腰椎移行部の神経腫の1例と文献的考察

Thoraco-lumbar Spinal Tumor associated with Papillrdema

Ⅰ．はじめに

　脳腫瘍の場合と同様，上部頸椎の腫瘍でもまれに脳圧充進症状，水頭症あるいはうっ血乳頭が出現することはよく知られた事実で，その頻度は2-3％といわれている^15，20）．

　しかし胸椎あるいは腰椎の腫瘍でこれらの症状が認められることはきわめてまれであり，Arseni ＆ Maretsis^3）によれば1967年までに文献上26例を数えるにすぎない．

Increased intracranial pressure and papilledema are occasionally observed in patients harboring spinal tumors in the cervical region or at the craniocervical junction, and the mechanical obstruction to the cerebrospinal fluid circulation is assumed to be responsible for such symptoms and signs. However, increased intracranial pressure is very rare in spinal tumors locating in the dorso-lumbar region; only 44 such cases having been reported in the literature.