retiform parapsoriasis retiform parapsoriasis retiform parapsoriasis is a cutaneous condition, considered to be a type of large-plaque parapsoriasis. it is characterized by widespread, ill-defined plaques on the skin, that have a net-like or zebra-striped pattern. skin atrophy, a wasting away of the cutaneous tissue, usually occurs within the area of these plaques. retiform parapsoriasisspecialtydermatology