Among them, abdominal pain, diarrhea, perianal abscess, perianal fistula, ileus, bowl resection history, elevated platelets, decreased albumin, elevated CRP, FOBT positive, comb sign, segmental distribution of lesion, cobblestone appearance, longitudinal ulcers, jejunal involvement, rectal involvement were seen more frequently in CD, whereas positive PPD skin test and positive T-SPOT were more frequently identified in ITB (P < 0.05, Table 1). The gene discussed is CRP; the disease is ileus.