Fig. 1. Clinicopathologic images of Becker's nevus in an 18-year-old man. (A) A brown hypertrichotic patches with multiple papules on the right chest. (B) Keratotic plugging, acanthosis, mild rete ridge elongation and fusion, basal hyperpigmentation, as well as smooth muscle and sebaceous hyperplasia and superficial perivascular lymphohistiocytic infiltration in the dermis (H&E, ×40).
