Verruciform xanthoma in an adolescent: a case report.

Background: Verruciform xanthoma is a benign mucocutaneous, verrucous, papillary lesion characterized by large foam cells in the parakeratotic layer, lipid-laden macrophages (xanthoma cells), epidermal hyperplasia, and hyperkeratosis. Verruciform xanthoma is thought to be a reactive rather than a neoplastic process secondary to epithelial damage and the presence of foamy histiocytes. The human papillomavirus has not been proven to be a causative factor.