Pityriasis Lichenoides- Two diseases forming spectrum of PL: pityriasis lichenoides et varioliformis acuta (PLEVA) and pityriasis lichenoides chronica (PLC)
- PLEVA: abrupt onset of erythematous papules and vesicles with crusted or necrotic centers, often involuting within weeks to months; treat with oral erythromycin, phototherapy, and/or topical corticosteroid
- PLC: reddish-brown papules with adherent scale, heals with dyschromia; more chronic course lasting months to years
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