巨大な側脳室内脳膜腫の1例

A CASE OF ENORMOUS LARGE MENINGIOMA OF THE LATERAL VENTRICLE

緒言

　近時脳外科の発達とともに脳室系腫瘍の手術経験例が増加する傾向にあり，なかでも脳室内脳膜腫は組織発生学的にも，また臨床的にも極めて興味あるものである。しかし之らについては欧米においてHenschen, F．et al （1955）^1）により65例，v．Karl, H．（1956）²により7例が集計されているにすぎなく，本邦における症例の集計ならびに総括検討の行なわれた文献を見出すことが出来ない。

　吾々はここに当教室にて経験した左側脳室内巨大脳膜症の1例を報告するとともに，本邦における脳室内脳膜腫を集計し，文献的考察を加えてみたいと思う。

A case of enormous large meningioma of the left lateral ventricle was presented.

Chief complaints were severe headache, en-largement of head, diminishing of visual ac-uity and diffuse deterioration in the mental function.

We observed the specific radiologic finding, that is, defect of the lt. lateral ventricle on the pneumoencephalography, and blown fluid were aspirated by burr hole in the left occi-pital area for pneumoventriclography.

On the operation a large tumor (9×8×7.5 cm in sixe, 300g.) with the appearance of meningioma was found expanding into cereb-ral tissue from the lateral ventricle.

11 cases of meningiomas of the lateral ven-tricle that were previously reported in Japan were reviewed and our experienced meningi-oma was the largest one.