Abstract
There are no accurate data on the prevalence and incidence of the clinically multifaceted group of parapsoriasis. The clinical variables in this group have a chronic course with only few clinical symptoms, if any; they may remain underreported although patients with parapsoriasis have an increased risk of subsequent cancers and increased mortality [1]. The group of parapsoriasis comprises several inhomogeneous, chronic-intermittently developing skin diseases which may clinically mimic psoriasis but are unrelated to each other with respect to their pathogenesis, histopathology, and response to treatment. Their etiology is unknown and the pathogenetic mechanisms are not fully understood. A part of these entities present inflammatory features as a reactive T-cell skin disease with vasculitis, often arising following infections, and another part is considered as precursor or early lymphoproliferative disorder with long-term progression into cutaneous T-cell lymphoma (CTCL). The majority of the entities included are associated with male predominance.
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Orfanos, C.E. (2018). Parapsoriasis. In: Orfanos, C., Zouboulis, C., Assaf, C. (eds) Pigmented Ethnic Skin and Imported Dermatoses. Springer, Cham. https://doi.org/10.1007/978-3-319-69422-1_22
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DOI: https://doi.org/10.1007/978-3-319-69422-1_22
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