Dermatologic diseases of the external ear
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2014
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Abstract
The external ear is composed of the auricle (pinna) and the external auditory canal. Both of these structures contain elastic cartilage (except the earlobe) and a small amount of subcutaneous fat, which are covered by skin. The skin of the cartilaginous canal contains hair cells, sebaceous (lipidproducing) glands, and apocrine (ceruminous) glands; this is in contrast with the osseous canal, which contains neither glands nor hair follicles. The auricle is susceptible to environmental influences and trauma. Due to its exposed locale, the ear is particularly vulnerable to the effects of ultraviolet light and, consequently, to preneoplastic and neoplastic skin lesions. The ear also has a sound-receiving function and a location that is both visible and aesthetically obvious, thereby drawing considerable attention from the patient. Dermatologic diseases on the external ear are seen in a variety of medical disciplines. Dermatologists, otorhinolaryngologists, family practitioners, and general and plastic surgeons are regularly consulted about cutaneous lesions on the ear. These lesions can be grouped into three main categories: (1) infectious; (2) tumoral; and (3) noninfectious inflammatory. The purposes of this contribution are to review various dermatologic diseases of the external ear and to update current diagnosis and treatment information related to these conditions. © 2014 Elsevier Inc.
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Bowen's Disease , Burns , Carcinoma, Basal Cell , Ear Diseases , Ear, External , Frostbite , Humans , Melanoma , Skin Diseases , Skin Neoplasms , aciclovir , aminopenicillin , antibiotic agent , antifungal agent , benzoyl peroxide , calcipotriol , clotrimazole , colchicine , corticosteroid , diclofenac , ethambutol , famciclovir , fluorouracil , imiquimod , immunosuppressive agent , isoniazid , ketoconazole , mafenide acetate , neomycin , pyrazinamide , quinoline derived antiinfective agent , retinoid , rifampicin , steroid , trichloroacetic acid , valaciclovir , acanthoma , acanthoma fissuratum , acne , actinic keratosis , adenoid cystic carcinoma , atopic dermatitis , auricular chondritis , basal cell carcinoma , blue nevus , Bowen disease , burn , chondritis , chondrodermatitis nodularis helicis chronicus , clinical feature , cold injury , contact dermatitis , differential diagnosis , ear surgery , ear tumor , external ear disease , external otitis , furunculosis , herpes zoster oticus , human , keloid , lupus erythematosus , lupus vulgaris , Lyme disease , lymphadenosis benigna cutis , lymphocytoma , malignant lentigo , melanocytic nevus , note , otomycosis , priority journal , psoriasis , Rendu Osler Weber disease , seborrheic dermatitis , seborrheic keratosis , skin disease , skin horn , squamous cell carcinoma , sweat gland tumor