Adult onset verrucous epidermal nevus.

Epidermal nevi are hamartomas of the skin and have multiple clinical variants, including a verrucous type. Usually verrucous epidermal nevi present at an early age, are found on the lower extremities, have a female predominance, and are refractory to treatment. Only very rarely do verrucous epidermal nevi have an adult onset. We describe a 60-year-old woman with a 5-year history of multiple verrucous plaques on her face, scalp, and neck. Histologic examination revealed the characteristic findings of verrucous epidermal nevus. This is the oldest patient reported with an adult onset verrucous epidermal nevus.