Pityriasis lichenoides et varioliformis acuta
Type of disease: Rare conditions
Pityriasis lichenoides et varioliformis acuta (PLEVA) is the acute form of a skin condition called pityriasis lichenoides. Affected people generally develop a few to more than one hundred scaling papules which may become filled with blood and/or pus or erode into crusted red-brown spots. PLEVA generally resolves on its own within a few weeks to a few months; however, some people experience episodes of the condition on and off for years. Although PLEVA is diagnosed in people of all ages, it most commonly affects children and young adults. The exact underlying cause is unknown, but some scientists suspect that it may occur due to an exaggerated immune response or an overproduction of certain white blood cells (lymphoproliferative disorder). If treatment is necessary, recommended therapies may include oral antibiotic, sun exposure, topical steroids, immunomodulators (medications used to help regulate or normalize the immune system), phototherapy and/or systemic steroids.Source: Genetic and Rare Diseases Information Center (GARD), supported by ORDR-NCATS and NHGRI.