<unk>  is a condition that normally only affects one side of the body (unilateral). Usually the left side of patients is affected. The condition is persistent and forms along characteristic lines. It usually appears on an extremity in infancy or childhood. Altman and Mehregan described six characteristic features of<unk> : (1) early age of onset, (2) predominance in females (4:1 female-male ratio), (3) frequent involvement of the left leg, (4) pruritus, or "itchiness" (5) marked refractoriness to therapy, and (6) a distinctive psoriasiform and<unk>  histologic appearance.
Inflammatory linear verrucous epidermal nevus
Linear verrucous epidermal nevus
Zosteriform speckled lentiginous nevus
Nodular lichen myxedematosus
Porokeratotic eccrine ostial and dermal duct nevus
Systematized epidermal nevus
Waxy keratosis of childhood
Eccrine nevus