Congenital pilar and smooth muscle nevus.
A case of congenital pilar and smooth muscle nevus (CPSMN) is reported. CPSMN is a distinct clinical and histologic entity characterized by prominent vellus hairs accompanying a proliferation of smooth muscle within the reticular dermis. Plaquelike elevation and mild hyperpigmentation are variable features of this unusual organoid nevus.
D002675:Child, Preschool; D006801:Humans; D008297:Male; D009130:Muscle, Smooth / Q000648:ultrastructure; D009508:Nevus, Pigmented / Q000151:congenital* / Q000648:ultrastructure; D012878:Skin Neoplasms / Q000151:congenital* / Q000648:ultrastructure