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Malignant Proliferating Trichilemmal Tumor in the Middle Ear and External Auditory Canal:Report of a Case Yuichiro Tada 1 1Department of Otolaryngology, Yamagata University School of Medicine pp.859-863
Published Date 1993/10/20
DOI https://doi.org/10.11477/mf.1411900796
  • Abstract
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A 60-year-old man who underwent 7 times of radical mastoidectoy in 34 years, was suspected of having cholesteatoma or benign tumor. The tumor, however, was progressive and proliferative, and finally invaded into the labyrinth, sphenoid sinus, middle and posterior fossa.

Histopathological examination revealed trichi-lemmal keratinization and atypical clear cells, and diagnosis of malignant proliferating trichilem-mal tumor was made. Differential diagnosis with cholesteatoma in the middle ear, external audi-tory canal cholesteatoma, keratosis obturans and squamous cell carcinoma was discussed.


Copyright © 1993, 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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