title: Congenital pilar and smooth muscle nevus.
mesh_terms: D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009130:Muscle, Smooth / Q000473:pathology; D009508:Nevus, Pigmented / Q000151:congenital* / Q000473:pathology; D010863:Piloerection; D012878:Skin Neoplasms / Q000151:congenital* / Q000473:pathology