Selective Immunoglobulin Deficiency Disease is related to immunoglobulin a deficiency 1 and dysgammaglobulinemia. An important gene associated with Selective Immunoglobulin Deficiency Disease is SH2D1A (SH2 Domain Containing 1A), and among its related pathways/superpathways are Innate Immune System and Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell. Related phenotypes are cellular and immune system