However, potential celiac disease might be present in a subgroup of IBS patients characterized by predominant diarrhea, increased celiac-associated antibodies apart from anti-TTG IgA in serum and in duodenal succus, increased mucosal intraepithelial lymphocytes, HLA-DQ2 expression, and response to a GFD [14]. The gene discussed is CD79A; the disease is irritable bowel syndrome.