title: A case of dysplastic nevus of the external auditory canal presenting with conductive hearing loss.
abstract: A nevus which is a benign melanocytic neoplasm rarely occurs within the external auditory canal (EAC). A dysplastic nevus presents atypical features both clinically and histologically, and is important as a potential precursor for melanoma. We present a case of a 33-year-old female patient with a dysplastic nevus in her EAC. Physical examination revealed a protruding mass arising from the posterior wall of the left cartilaginous EAC. The mass showed clinically characteristic findings of a melanocytic nevus. The patient underwent excisional biopsy via a transcanal approach under local anesthesia. Histopathological examination revealed an intradermal nevus with atypical melanocytes without pleomorphism. There was no evidence of recurrence two years after surgical excision.
authors.affiliation: Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Hallym University, Seoul, Korea. kcw5088@dreamwiz.com
authors.forename: Chang Woo
authors.initials: CW
authors.lastname: Kim
authors.forename: So Jung
authors.initials: SJ
authors.lastname: Oh
authors.forename: Young-Soo
authors.initials: YS
authors.lastname: Rho
authors.forename: Seong Jin
authors.initials: SJ
authors.lastname: Cho
authors.forename: Eun Seok
authors.initials: ES
authors.lastname: Koh
mesh_terms: D000328:Adult; D004416:Dysplastic Nevus Syndrome / Q000175:diagnosis* / Q000473:pathology* / Q000601:surgery; D004424:Ear Canal / Q000473:pathology* / Q000601:surgery; D005260:Female; D006314:Hearing Loss, Conductive / Q000209:etiology* / Q000601:surgery; D006801:Humans; D016896:Treatment Outcome