In patients with IgG4‐RD‐related autoimmune pancreatitis (AIP), IFN‐α and B‐cell activating factor (BAFF)‐expressing pDCs were identified in pancreatic tissue, with these patients also exhibiting higher serum IFN‐α and BAFF levels than healthy controls [107]. The gene discussed is TNFSF13B; the disease is autoimmune pancreatitis.