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Radiology. 1996 Jan;198(1):185-92.

Early-stage rheumatoid arthritis: diagnostic accuracy of MR imaging.

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1
Department of Radiology, Jichi Medical School, Japan.

Abstract

PURPOSE:

To investigate the role of magnetic resonance (MR) imaging in diagnosing early rheumatoid arthritis (RA).

MATERIALS AND METHODS:

Twenty patients (three men, 17 women; age range, 21-72 years) with clinically and radiologically proved RA underwent evaluation to define an MR imaging criterion for diagnosing synovial inflammation due to RA. Twenty-seven patients (16 with RA, 11 without RA [control patients]; three men, 24 women; age range, 19-75 years) suspected to have early RA but without radiographic abnormalities underwent evaluation to test the accuracy of using the criterion to diagnose RA. In each patient, coronal, fat-suppressed, and gadolinium contrast material-enhanced, T1-weighted images of both hands were obtained.

RESULTS:

The MR imaging criterion was periarticular contrast material enhancement of the wrists or the metacarpophalangeal and/or proximal interphalangeal joints in both hands. In the diagnosis of early RA, sensitivity and negative predictive value were both 100%, specificity was 73%, and accuracy was 89%.

CONCLUSION:

MR imaging is extremely useful in diagnosing early RA.

[Indexed for MEDLINE]

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