脳腫瘍患者の脳波所見（II）—頭蓋咽頭腫の5例

The Electroencephalogram in Cases of Intracranial Tumors (Part II):5 Cases of Craniopharyngioma

　脳腫瘍の診断に当つて，脳波検査が屡々施行されて居るが，腫瘍が深部や遠隔部に存在する場合には，その存在は疑われても局在診断に寄与する場合は少いとされて居る。深部に発生する腫瘍の中で，Craniopharyngiolnaは，下垂体柄部或は漏斗部より発生し，硬脳膜の鞍隔膜部の直下或は直上部にあり，略部位が一定して居る。Strauss等（1952）は，己にCraniopharyngiomaの症例の脳波所見について4例の結果を報告して居るが，1例に5〜6c／sのdiffuse slow wave bu-rstsを見た以外には著しい所見を得て居ない。近年にはKammerer等（1955）の臨床，脳波的検索の報告もあるが，我六は5例の症例につき，その臨床症状，経過，更に脳外科的に或は病理解剖学的に其の局在，大きさ，性状を詳細に調査しCraniopharyngiomaである事が確認され，その臨床経過中に得られた脳波所見について検討した結果を報告する。

1) The EEG. findings on 5 cases of cranio- pharyngioma were investigated. The rem- arkable abnormalities of EEG. records were observed in both occipital areas chiefly in child cases and on the contrary, in both frontal areas in adult cases. This fact may be come from the development of cranium in childhood, or be founded on the expan- sive tendency of tumors which in child cases developed to the basis of brain and in adult cases into the third ventricle mostly.

2) Sometimes, 5~6c/s. slow wave bursts appeared chiefly in both frontal bilaterally synchronously, that may be related with bifrontal delta rhythms in mesodiencepha- lic anatomical lesions which have been described by Passouant et al in 1955.

3) In most cases have brain tumors in the location with mesodiencephalic lesions, especially in the third ventricle, general slow waves appeared remarkably. Kersh- man et al (1949) described symmetric 5~ 6c/s. activity as the common abnormality with tumors in and around the third ven- tricle.

4) Some of midline tumors showed the loca- lized suppression due to slight in lination of location.