A case of bilateral cutaneous amyloidosis of the external auditory canals caused by ear-pick irritation

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  • Hara Minoru
    Department of Otorhinolaryngology, Kamio Memorial Hospital
  • Kaga Kimitaka
    Department of Otorhinolaryngology, Kamio Memorial Hospital National Institute of Sensory Organs, National Hospital Organization Tokyo Medical Center
  • Kamio Tomonobu
    Department of Otorhinolaryngology, Kamio Memorial Hospital

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Other Title
  • 耳かき刺激に起因すると考えられた両側外耳道の皮膚アミロイドーシスの一例
  • ミミカキ シゲキ ニ キイン スル ト カンガエラレタ リョウガワ ガイジドウ ノ ヒフ アミロイドーシス ノ イチレイ

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Abstract

<p>Amyloidosis of the external auditory canal is often differentially diagnosed as mass lesions of the ear canal and has been reported in several cases; however, it is rare and not widely known.</p><p>This is a case report of a 70-year-old woman who presented at her first visit with multiple small skin nodules were observed on the skin of the external auditory canal, on both sides. The pathological findings included subepithelial acidophilic non-structural material and a red-orange color on Dylon staining, which led to the diagnosis of amyloidosis of the external auditory canals. Subsequent systemic assessment revealed no other lesions, and we concluded that the patient had cutaneous amyloidosis confined to the external auditory canal. No specific treatment was administered, and regular ear cleaning and follow-up were performed. The tumors have been decreasing in size but have not disappeared.</p><p>In dermatology, amyloid is often deposited in regions that encounter friction by the long-term use of nylon towels and brushes. Furthermore, chronic mechanical stimulation, such as habitual ear picking, may be involved in the origin of external auditory canal amyloidosis, as in this case.</p>

Journal

  • Otology Japan

    Otology Japan 32 (2), 253-257, 2022

    Japan Otological Society

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