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Radiology, Vol 122, 17-23, Copyright © 1977 by Radiological Society of North America

ARTICLES

Septic arthritis: a complication of rheumatoid arthritis

MI Gelman and JR Ward

Eighteen cases of long-standing rheumatoid arthritis and superimposed pyarthrosis were reviewed to determine the most distinguishing radiographic features. Soft-tissue changes allowed earlier diagnosis in the knee and ankle joints and consisted of large asymmetrical joint effusion and fat-pad edema. Bony articular changes were more helpful than soft-tissue changes in the wrist and hip because of the paucity of adjacent extracapsular fat and were associated with delayed radiographic recognition of superimposed pyarthrosis. These changes are presumptive evidence of complicating septic arthritis and their presence necessitates needle aspiration and culture of the joint for proper definitive treatment.


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R. B. Kherani and K. Shojania
Septic arthritis in patients with pre-existing inflammatory arthritis
Can. Med. Assoc. J., May 22, 2007; 176(11): 1605 - 1608.
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