Pityriasis Lichenoides is related to lymphoproliferative syndrome and burkitt lymphoma. An important gene associated with Pityriasis Lichenoides is MS4A1 (Membrane Spanning 4-Domains A1), and among its related pathways/superpathways is Cytokine Signaling in Immune system. The drugs Azithromycin and Anti-Bacterial Agents have been mentioned in the context of this disorder. Affiliated tissues include skin and tongue, and related phenotypes are immune system and hematopoietic system