Blue naevus associated with trichoepithelioma: a report of two cases

Naevocellular naevi may show considerable histological variation and have often been shown to contain other ectodermal elements, as well as cells of melanocytic origin. Blue naevi are also thought to be of melanocytic origin, and in this report we describe two blue naevi in which trichoepitheliomatous elements were seen. The aetiological implications of this observation are discussed.