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Radiation-induced External Ear Canal Cholesteatoma-like Disease Akiko Ishihara 1 1Department of Otorhinolaryngology, Tokyo Medical and Dental University pp.425-428
Published Date 1999/6/20
DOI https://doi.org/10.11477/mf.1411902003
  • Abstract
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Three cases of cholesteatoma-like disease in the ear canals after radiation therapy for head and neck tumor were reported. Effect of irradiation onbone and soft tissue including skin brings about pathological reaction to the external ear canal as well. Two types of disease resembling choles-teatomas have been recognized:(1) keratosis obturans (KO) and (2) external auditory canal cholesteatoma (EACC). KO appears to be derived from disease of canal skin involved with keratiniza-tion, creating a widning of the canal. EACC, on the other hand, seems to develop in the disease of bony canal where a localized absorption of its bone with invasion of squamous epithelium takes place.


Copyright © 1999, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1316 印刷版ISSN 0914-3491 医学書院

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