Keratinic amyloidosis of the external auditory canal |
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Authors: | Koichiro Wasano Hideyuki Saito Sho Kanzaki Kaoru Ogawa |
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Institution: | 1. Department of Otolaryngology, Head and Neck Surgery, Keio University School of Medicine, Tokyo, Japan;2. Department of Otolaryngology, Japanese Red Cross Shizuoka Hospital, Shizuoka, Japan |
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Abstract: | ObjectiveWe present a rare case of keratinic amyloidosis of the external auditory canal. This is only the seventh case reported of localized cutaneous amyloidosis of the external auditory canal with no systemic symptoms.PatientA 62-year-old man, who had complained of an itchy external auditory canal and left-side hearing loss, was referred to our hospital because of a bilateral external auditory canal mass.InterventionBiopsy of the external auditory canal mass suggested a diagnosis of amyloidosis. However, total systemic examination failed to identify any disease due to systemic amyloidosis. This led us to diagnose him with localized cutaneous amyloidosis of the external auditory canal.Main outcome measureWe follow up periodically with systemic examination and local observation.ResultsThirty months after the initial diagnosis, he remains in follow-up and has not shown any significant aggravation of the disease.ConclusionIn previous cases, the chief complaints were itching sensations and pain in the external auditory canal as well as a sense of discomfort when wearing a hearing aid. This suggests that chronic stimulation and inflammation of the skin lining the external auditory canal induced amyloidosis. |
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Keywords: | Local amyloidosis Keratin amyloidosis External auditory canal Cytokeratin |
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