Trichoepithelioma.

A 29-year-old man presented with a long-standing history of asymptomatic, skin-colored, facial papules and nodules. Histopathologic examination of a representative papule demonstrated trichoepithelioma. The patient had a history of a brother with a similar phenotype, which suggests a diagnosis of familial trichoepithelioma. Linkage and mutational analyses support genetic heterogeneity of familial trichoepithelioma, possibly sharing a clinical spectrum with Brooke-Spiegler syndrome and familial cylindromatosis since each entity has been associated with mutations the CYLD gene.