'Pseudoseptic' arthritis in patients with rheumatoid arthritis.

It is generally recognized that patients with rheumatoid arthritis are at greater risk than the general population for the development of bacterial joint infection. It is not usually appreciated, however, that such patients may present with a clinical syndrome that mimics septic arthritis in most respects except that all cultures are consistently negative and antibiotics are not essential for treatment. We report our experience with five cases of "pseudoseptic" arthritis in patients with rheumatoid arthritis and suggest an approach for management.