Lymphoproliferative Syndrome, X-Linked, 1, also known as lymphomatoid papulosis, is related to primary cutaneous anaplastic large cell lymphoma and mycosis fungoides. An important gene associated with Lymphoproliferative Syndrome, X-Linked, 1 is SH2D1A (SH2 Domain Containing 1A), and among its related pathways/superpathways are Innate Immune System and Signal Transduction. The drugs Cytarabine and Melphalan have been mentioned in the context of this disorder. Affiliated tissues include t cells and skin, and related phenotypes are hypoalbuminemia and pancytopenia