Cockade naevus: an unusual variant of the benign cellular naevus.

A patient with benign cellular naevi with unusual target-like morphology is described. Histological and histochemical examination of the lesions showed Dopa oxidase positive cells in the epidermal portion of the tumour but only the naevus cells and keratinocytes at the periphery of the tumour stained for melanin. It is suggested that failure of melanin synthesis is the cause of the target-like appearance.