Pityriasis lichenoides et varioliformis acuta (also known as "acute guttate parapsoriasis", "acute parapsoriasis", "acute pityriasis lichenoides", "Mucha–Habermann disease", "parapsoriasis acuta", "parapsoriasis lichenoides et varioliformis acuta", and "parapsoriasis varioliformis":456:736) is a disease of the immune system. It is the more severe version of pityriasis lichenoides chronica. The disease is characterized by rashes and small lesions on the skin. The disease is more common in males and usually occurs in young adulthood, although it has been seen in every age group and every race. It is possible for the disease to go into remission for short periods of time or forever.
It is commonly misdiagnosed as chickenpox or rosacea. Pleva is also often misidentified as a form of staph. The most accurate way to diagnose it is by biopsy. This disease has not been known to be life-threatening. However, there may be mutations of the disease that can cause ulcers on the exterior.
^Tomasini D, Tomasini CF, Cerri A et al. (2004). "Pityriasis lichenoides: a cytotoxic T-cell-mediated skin disorder. Evidence of human parvovirus B19 DNA in nine cases". J. Cutan. Pathol.31 (8): 531–8. doi:10.1111/j.0303-6987.2004.00186.x. PMID15268707.
^Linsey Davis (January 4, 2013). "High School Basketball Star Must Tan to Treat Rare Disease". ABC News. Retrieved January 4, 2013. Doctors say the ultraviolet technique is so effective that Borrelli cannot miss a single day of tanning, especially since the disease can resurface at any time and cause life-threatening complications in adults.