Chondrodermatitis Nodularis Chronica Helicis

Abstract

We treated chondrodermatitis nodularis chronica helicis in a 56-year-old man. Clinically the patient had a cartilaginous hard, superficial, brownish, dome-shaped nodule with a small central depression, 8mm in diameter and about 2mm thick, on the helix of the right ear. Histologically, nodular acanthosis with a central depression capped by a hyper- and parakeratotic scale, fibrinoid degeneration of dermal collagen with formation of a subepidermal cyst, a vascularized granulation tissue surrounding the degenerated collagen and perichondritis with cartilaginous degeneration were identified. The degenerated materials showed a transepidermal elimination.