TNFRSF13C and Autoimmunity: Among humoral defects, autoimmunity is a common feature in patients with Common Variable Immunodeficiency (CVID, including those with taci defect, baff-r defect, icos, NF-kB1 and NF-kB2 deficiency), selective IgA Deficiency (sIgAD), and hyper-IgM syndrome (HIGM).