RT Journal Article SR Electronic T1 Ulcerative colitis complicating seronegative HLA-A2-B27 rheumatoid arthritis with sacroiliitis. JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 1009 OP 1011 DO 10.1136/ard.51.8.1009 VO 51 IS 8 A1 T Klausen A1 K Amris A1 P Helin YR 1992 UL http://ard.bmj.com/content/51/8/1009.abstract AB The case is reported of a 50 year old man with longstanding seronegative rheumatoid arthritis who developed ulcerative colitis. The patient also had sacroiliitis and his tissue was typed as HLA-A2-B27 several years before the bowel disease began. A possible overlap between primary inflammatory bowel disease, complications to the treatment of rheumatoid arthritis with drugs, and gastrointestinal rheumatoid vasculitis is discussed.