Ear Nose Throat J. 2007 Dec;86(12):734-5.
FIRST PARAGRAPH: Chondrodermatitis nodularis helicis (CDNH) is a non-neoplastic inflammatory and degenerative process of the external ear. It is characterized by necrobiotic changes in the dermis that extend down to the perichondrium; associated alterations are seen in the cartilaginous plate. The dermal injury is thought to be attributable to a combination of factors: local trauma, actinic damage, and the relatively tenuous vascularity of the auricle. The necrobiotic dermal collagen—and in some cases the cartilaginous matrix—is extruded through a crater-like defect in the epidermis; thus, CDNH is considered to be one of the transepidermal elimination disorders.
PubMed ID: 18217375
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