Parapsoriasis, also known as parapsoriasis en plaques, is related to pityriasis rosea and primary cutaneous t-cell non-hodgkin lymphoma. An important gene associated with Parapsoriasis is CADM1 (Cell Adhesion Molecule 1), and among its related pathways/superpathways are Innate Lymphoid Cells Differentiation and Network map of SARS-CoV-2 signaling pathway. The drugs Apremilast and Thalidomide have been mentioned in the context of this disorder. Affiliated tissues include skin and t cells.