Besides, TNF signaling pathway, IL-17 signaling pathway, toll-like receptor signaling pathway, VEGF signaling pathway, inflammatory bowel disease, MAPK signaling pathway, Th17 cell differentiation, NF-kappa B signaling pathway, Th1 and Th2 cell differentiation, Epstein-Barr virus infection, T cell receptor signaling pathway, human cytomegalovirus infection, NOD-like receptor signaling pathway, human immunodeficiency virus 1 infection and apoptosis were demonstrated to correlate with immune diseases. The gene discussed is IL17A; the disease is inflammatory bowel disease.