Immunodeficiency with Hyper-Igm, Type 2, also known as hyper-igm syndrome type 2, is related to immunodeficiency with hyper-igm, type 5 and dysgammaglobulinemia. An important gene associated with Immunodeficiency with Hyper-Igm, Type 2 is AICDA (Activation Induced Cytidine Deaminase), and among its related pathways/superpathways are Cytokine Signaling in Immune system and TNF Superfamily - Human Ligand-Receptor Interactions and their Associated Functions. Affiliated tissues include lymph node and b cells, and related phenotypes are recurrent respiratory infections and decreased circulating iga level