Immunodeficiency-Centromeric Instability-Facial Anomalies Syndrome 1, also known as immunodeficiency syndrome, variable, is related to immunodeficiency-centromeric instability-facial anomalies syndrome and immunodeficiency, common variable, 10, and has symptoms including diarrhea An important gene associated with Immunodeficiency-Centromeric Instability-Facial Anomalies Syndrome 1 is DNMT3B (DNA Methyltransferase 3 Beta). The drugs Rifaximin and Immunoglobulin G have been mentioned in the context of this disorder. Affiliated tissues include bone marrow and t cells.