Pityriasis Lichenoides Watchlist (log in to enable) Retrieved 2021-01-18 Source Wikipedia Trials — Genes MMP12, FOXP3 Drugs — Interested in hearing about new therapies? Registered! Pityriasis lichenoides is a form of pityriasis. Types include: Pityriasis lichenoides et varioliformis acuta Pityriasis lichenoides chronica