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| Fig. 41.4 A Becker’s nevus on the upper back of a young man. This lesion has no potential for malignant degeneration. |
A Becker’s nevus is characterized by an area of hyperpigmentation and often hypertrichosis, most commonly on the upper back, shoulder, or chest of males (Fig. 41-4). The lesions usually become noticeable at puberty. Histologically, there are increased numbers of melanocytes, dermal melanophages, terminal hairs, and hyperpigmentation of the epidermal basal layer. Some lesions can also show increased smooth muscle and have been called smooth muscle hamartomas.
Danarti R, Konig A, Salhi A, et al: Becker’s nevus syndrome revisited,
J Am Acad Dermatol 51:965–969, 2004.
