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THE POSITIVE ELBOW FAT PAD SIGN IN RHEUMATOID ARTHRITIS

ROGER J. JACKMAN M.D.1 and DAVID G. PUGH M.D.2

1 Resident in Radiology.
2 Section of Roentgenology, Mayo Clinic and Mayo Foundation.

In a random survey of 834 elbows, a positive fat pad sign occurred as often from rheumatoid arthritis as from trauma. Of 160 elbows with roentgenographic and clinical diagnoses of rheumatoid arthritis, 88.1 per cent had elevated fat pads. Generally, the anterior and posterior fat pads were both elevated, but elevation of a single pad was considered positive, just as with cases in which there is trauma. In rheumatoid arthritis, the fat pads may be elevated when there is only periarticular demineralization or when the bones are completely normal.

A positive fat pad sign without a history of trauma is most likely indicative of rheumatoid arthritis.


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