PT - JOURNAL ARTICLE AU - T Klausen AU - K Amris AU - P Helin TI - Ulcerative colitis complicating seronegative HLA-A2-B27 rheumatoid arthritis with sacroiliitis. AID - 10.1136/ard.51.8.1009 DP - 1992 Aug 01 TA - Annals of the Rheumatic Diseases PG - 1009--1011 VI - 51 IP - 8 4099 - http://ard.bmj.com/content/51/8/1009.short 4100 - http://ard.bmj.com/content/51/8/1009.full SO - Ann Rheum Dis1992 Aug 01; 51 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.