Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) X-linked immunodeficiency with magnesium defect, Epstein-Barr virus infection, and neoplasia ?
    ### Response:
    X-linked immunodeficiency with magnesium defect, Epstein-Barr virus infection, and neoplasia (typically known by the acronym XMEN) is a disorder that affects the immune system in males. In XMEN, certain types of immune system cells called T cells are reduced in number or do not function properly.
    