Immunodeficiency, X-Linked, with Magnesium Defect, Epstein-Barr Virus Infection, and Neoplasia, also known as xmen, is related to lymphopenia and congenital disorder of glycosylation, type in. An important gene associated with Immunodeficiency, X-Linked, with Magnesium Defect, Epstein-Barr Virus Infection, and Neoplasia is MAGT1 (Magnesium Transporter 1), and among its related pathways/superpathways are Transport of inorganic cations/anions and amino acids/oligopeptides and Glycosylation and related congenital defects. The drugs Magnesium sulfate and Anesthetics have been mentioned in the context of this disorder. Affiliated tissues include t cells and b cells, and related phenotypes are splenomegaly and recurrent otitis media