Desmoplastic trichoepithelioma and melanocytic nevus: dermoscopic and reflectance confocal microscopy presentation of a rare collision tumor.

Fig 1. Desmoplastic trichoepithelioma and melanocytic nevus (collision tumor). Dermoscopy of the skin-colored papule on the right cheek (clinical detail) disclosed sharply focused, fine arborizing vessels (arrows), mostly at the periphery on a white-ivory background (black asterisk) in the upper half of the lesion and structureless light-brown (white asterisk) in the lower half. Few white clods (arrowheads) probably corresponding to horn cysts were also seen. There were no leaflike structures, ovoid nests, or shiny-white streaks.