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PIGMENTED NEVUS OF THE EXTERNAL AUDITORY CANAL: DISTRIBUTION OF DOPA OXIDASE Tadayoshi Kosugi 1 pp.297-301
Published Date 1977/4/20
DOI https://doi.org/10.11477/mf.1492208490
  • Abstract
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 A case of pigmented nevus of the external auditory canal is reported. The growth was surgically removed and histopathological and histochemical studies were made on the specimen.

 With ordinary staining melanin was found in the dermis and the basal layer showed clear cells. With dopaoxidase reaction positive cells were found to be distributed along the upper portion of the dermis and basal layer of the epidermis. According to the classification of Kawamura, et al, this growth appeared to be a compound nevus. The patient is free from postoperative atresia of the external canal 4 months after the operation.


Copyright © 1977, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 印刷版ISSN 0386-9679 医学書院

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