A 34-Year Man with Verrucous Lesion on the Scalp

Abstract

Nevus sebaceous of Jadassohn is congenital hamartomatous lesion with an epithelial and adnexal origin presents in 0.3% of the general population. Women and men are equally affected. The lesion is usually located on the head and neck area. Nevus sebaceous appears at birth or in early infancy as a hairless, solitary, linear or round, slightly raised, pinkish, yellow or orange plaque, with a smooth surface. During puberty, the lesion grows and becomes verrucous and nodular. Later, in life, in 20–30% of cases neoplastic transformation may occur. Nevus sebaceous is most commonly diagnosed based on the clinical manifestation. In cases of ambiguity dermoscopy and punch biopsy with histopathological examination may be useful. Due to the risk of neoplastic transformation, surgical removal of the lesion is commonly recommended. Some dermatologists suggest regular physical and dermoscopic evaluation instead of prophylactic excision of the lesion.