| Term Name: | X-linked immunodeficiency with magnesium defect, Epstein-Barr virus infection, and neoplasia | 
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| Synonyms: | XMEN | 
| Definition: | A T cell deficiency that is characterized by CD4 lymphopenia, severe chronic viral infections, and defective T-lymphocyte activation in males and has_material_basis_in X-linked inheritance of mutations in the gene encoding magnesium transporter-1 (MAGT1). | 
| Ontology: | Human Disease [DOID:0080319] ( DOID:0080319 ) |