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Arachnoid cysts confined to the internal auditory canal or facial nerve canal

Published online by Cambridge University Press:  03 August 2011

Q Zhang ,
K Kaga ,
M Sano  and
H Takegoshi
Q Zhang
Affiliation:
Department of Otology and Neurotology, National Institute of Sensory Organs, National Tokyo Medical Center, Tokyo, Japan Department of Otolaryngology, Head and Neck Surgery, The 2nd Affiliated Hospital, Faculty of Medicine, Xi'an Jiaotong University, Xi'an, People's Republic of China
K Kaga*
Affiliation:
Department of Otology and Neurotology, National Institute of Sensory Organs, National Tokyo Medical Center, Tokyo, Japan
M Sano
Affiliation:
Department of Otorhinolaryngology, School of Medicine, Teikyo University, Tokyo, Japan
H Takegoshi
Affiliation:
Department of Otology and Neurotology, National Institute of Sensory Organs, National Tokyo Medical Center, Tokyo, Japan
*
Address for correspondence: Dr Kimitaka Kaga, National Institute of Sensory Organs, National Tokyo Medical Center, 2-5-1 Higashigaoka, Meguro-ku, Tokyo, 152-8902, Japan Fax: +81 3 3411 0185 E-mail: kimikaga-tky@umin.ac.jp
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Abstract

Objective:

To illustrate the morphological characteristics and pathological significance of arachnoid cysts confined to the internal auditory canal or facial nerve canal.

Design:

Retrospective case series.

Subjects:

Three patients' cases were reviewed, and temporal bone sections examined histologically.

Results:

In this series, three intracanalicular arachnoid cysts were found in the internal auditory canal and one in the facial nerve canal. All lesions consisted of distinct, space-occupying cysts with a sharp boundary with surrounding tissues. They were thin-walled and compressed the surrounding nerve trunks to a variable degree. However, there was no indication that patients suffered meatal nerve dysfunction.

Conclusion:

Arachnoid cysts can develop within the internal auditory canal or facial nerve canal. In our series, they were asymptomatic, which is quite different from most intracanalicular arachnoid cysts encountered in clinical practice.

Keywords

Temporal BonePathologyArachnoid CystFacial Nerve
Type
Clinical Records
Information
The Journal of Laryngology & Otology , Volume 125 , Issue 10 , October 2011 , pp. 1053 - 1058
Copyright
Copyright © JLO (1984) Limited 2011

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