Immunodeficiency with Hyper-Igm, Type 1, also known as immunodeficiency, x-linked, with hyper-igm, is related to immunodeficiency with hyper-igm, type 5 and immunodeficiency with hyper-igm, type 4, and has symptoms including diarrhea An important gene associated with Immunodeficiency with Hyper-Igm, Type 1 is CD40LG (CD40 Ligand), and among its related pathways/superpathways are ERK Signaling and Innate Immune System. The drugs Immunoglobulin G and Immunoglobulins, Intravenous have been mentioned in the context of this disorder. Affiliated tissues include liver and bone marrow, and related phenotypes are decreased circulating igg level and pneumocystis carinii pneumonia