pityriasis lichenoides pityriasis lichenoides pityriasis lichenoides is a form of pityriasis. pityriasis lichenoides et varioliformis acutaphoto of the pityriasis lichenoides et varioliformis acuta or mucha habermann's disease, showing the right legspecialtydermatology types include: pityriasis lichenoides et varioliformis acuta pityriasis lichenoides chronica