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KMID : 0361020180610120714
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Korean Journal of Otolaryngology - Head and Neck Surgery
2018 Volume.61 No. 12 p.714 ~ p.717
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A Case of Epidermal Cyst Occurred in the Bony External Auditory Canal Misdiagnosed as External Auditory Canal Carcinoma
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Lim Sung-Hwan
Koo Beom-Mo
Park Po-Na
Cho Hyun-Sang
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Abstract
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Epidermal cysts are generally benign tumors that usually originate from the skin caused by inflammation of hair cortex and proliferation of epidermal cells within the dermis; however, for these cysts to occur in the bony external auditory canal (EAC) is rare. They are often present as a solitary, painless lesion and usually asymptomatic and the diagnosis depends on the results of the histological examination. In treatment, the cyst wall must be completely removed surgically. We recently encountered a 82-year-old male with a mass in the right EAC. An otoscopic examination showed a polypoid mass on the bony EAC, which was finally diagnosed as epidermal cyst after an initial misdiagnosis as EAC carcinoma. We report the rare, unique case with literature review.
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KEYWORD
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Carcinoma, Epidermal cyst, External auditory canal
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