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Japanese

PRIMARY ARACHNOID CYST OF CEREBELLOPONTINE ANGLE: A CASE OF CYST OF FORAMINE LUSCHKA Yutaka Maki 1 , Tohru Akashi 1 , Shizuo Shirai 1 , Mamoru Watanabe 1 , Tadao Nose 1 1Department of Neuropsychiatry, Unit of Neurological Surgery, School of Medicine, Chiba University pp.259-266
Published Date 1970/3/1
DOI https://doi.org/10.11477/mf.1406202688
  • Abstract
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The case of a 40-year-old man with primary cyst in the cerebellopontine angle producing the clinical picture of acoustic neurinoma with obstructive hy-drocephalus is reported. The surgical removal of the wall of the cyst produced excellent improvement. The cyst in this case was lined with ependymal lining.

The literature of arachnoid cyst in the posterior fossa was reviewd and we divided them into 4 groups (midline, cerebellopontine angle, ambient cisternal and superior cerebellar group) and discussed them from the clinical and histological points of view.

1) From the histological point of view, cerebello-pontine angle group were mostly ependymal in origin and superior cerebellar group belongs to meningoencephalccele. On the other hand, ambient cysternal and cerebellar midline groups were arachnoidal in origin, and occasionally had choroid plexus tufts. 2) From the clinical point of view : i) As to the cerebellopontine angle group, there were no infantile cases and usually acoustic neurinomas or cerebellar tumor had been suspected. Two phases distribution of onset age was recognized among those groups except pontin angle one, and their clinical manifestation was always hydrocephalus in the infants and also cerebellar tumor in more advanced age groups. ii) Intermittent symptoms (such as headache, vomiting or ataxia) were observ-ed high incidence of 85. 7% in the cerebellopon-tine angle group. On the other hand, no such intermittent symptoms were observed in the infan-tile cases, but 84.6% of adult cases in other groups. That is, as for the adult cases, the intermittent symptoms bares the significant diagnostic value.


Copyright © 1970, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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