Summary

Patients with inflammatory bowel disease who do not respond to steroid therapy often require treatment with immunomodulators in an attempt to achieve a response and maintain remission. However, a major concern and controversy is whether these treatments are putting the patients at a significantly increased risk of developing lymphomas. This case reports a patient with severe ulcerative colitis who had been previously treated with azathioprine and infliximab, and subsequently developed diffuse large B-cell colonic lymphoma.