天膜部髄膜腫に合併した無症候性脊髄空洞の1例

Association of Asymptomatic Syringomyelia with Tentorial Meningioma

I．はじめに

　脊髄髄内腫瘍に脊髄空洞が合併する割合は25-58％で脊髄空洞に脊髄腫瘍を伴う割合は8-16％とされているが^1），脳腫瘍と脊髄空洞の合併の報告は少ない．今回われわれは天膜部髄膜腫に伴った無症候性脊髄空洞の1例を経験したので，脳腫瘍に合併する脊髄空洞という観点に的を絞り，その発生機序と脊髄空洞症の分類上に占める位置づけについて考察する．

A case of asymptomatic syringomyelia associatedwith tentorial meningioma is reported. A 53-year-old female was admitted to our hospital with the com-plaints of headache, decrease of bilateral visual acuity and gait disturbance. Neurological examination re-vealed no abnormality except for bilateral papilledema and left cerebellar sign. Motor and sensory systems were also intact. CT and MRI scans showed a left tentorial mass lesion, cervical syringomyelia and left tonsillar herniation. A relationship between the fourth ventricle and syringomyelia was not clearly identified.