Halo congenital nevus

Abstract
A 24 yr old women noted a depigmented halo around a pigmented lesion that was present on her abdomen since birth. The halo and the central pigmented zone showed no change during the following year. Light and EM studies disclosed an uninflamed nevus extending to the deep reticular dermis; peripherally, the basal layer of the epidermis was depigmented. A halo may develop about an uninflamed nevus that does not involute; the nevus may show the specific histopathology of congenital nevus.

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