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CP ANGLE EPIDERMOID PRESENTING AS HEMIFACIAL SPASM Shinichiro Miyazaki 1 , Takanori Fukushima 2 1Department of Neurosurgery, Hitachi General Hospital 2Department of Neurosurgery, Mitsui Memorial Hospital pp.951-955
Published Date 1983/10/1
DOI https://doi.org/10.11477/mf.1406205194

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  • Abstract
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A rare case of CP angle epidermoid presenting as hemifacial spasm was reported. The patient was a 48-year-old woman with left hemifacial spasm of 4 years duration. Preoperative CT films showed some low density area in the left CP angle, how-ever, this finding was thought to be within nor-mal variation. The diagnosis of CP angle epider-moid was made at the time of craniectomy aimed for microvascular decompression. The epidermoid was extending from the lower cranial nerves up to the midbrain level and successfully removed with the same craniectomy opening. Postoperative follow up during 16 months period disclosed complete disappearance of hemifacial spasm and no other neurological deficit.

So far, the authors have experienced 425 cases of microvascular decompression for hemifacial spasm and there was only 1 case in whom a CP angle epidermoid was found (O.24%).

A review of the literature revealed that hemi-facial spasm due to CP angle epidermoid was very rare (1.2%). It was also reported that if there is CP angle epidermoid, hemifacial spasm may appear n the incidence of 7.7-10%.

A possibility of CP angle epidermoid should be kept in mind when performing microvascular decompression for hemifacial spasm particularly in yonger patients.


Copyright © 1983, 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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