Arthritis associated with the inflammatory bowel disorders ulcerative colitis and Crohn’s disease is usually named enteropathic arthritis. The estimated incidence of axSpA in patients with inflammatory bowel diseases have varied being up to 20%, but the frequency of peripheral arthritis is much higher doi:10.1016/j.autrev.2019.102457

The imaging findings are variable, partly depending on the presence or absence of HLA-B27. They can be like the changes seen in AS or like the changes seen in reactive arthritis. Please see the description of their imaging features.