Chronic erosive arthritis associated with an unusual intestinal bypass.

We describe an unusual intestinal bypass arthritis in a 37-year-old man. The intestinal bypass was unusual because the intestinal blind loop was entirely composed of colon. The arthritis was first a typical bypass arthritis but later resembled rheumatoid arthritis. In spite of this resemblance, all rheumatic symptoms disappeared after jejunocaecal reanastomosis.