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Original Article

Effect of Intraarticular Osmic Acid on Synovial Membrane Volume and Inflammation, Determined by Magnetic Resonance Imaging

, , , , , & show all
Pages 5-12 | Received 24 Mar 1994, Accepted 31 Aug 1994, Published online: 12 Jul 2009
 

Abstract

The changes in MR-determined synovial membrane volume, early synovial enhancement, and cartilage and bone erosions after osmic acid knee synovectomy were studied. Gadolinium-DTPA enhanced magnetic resonance imaging (MRI) of 18 knees with persistent arthritis was performed before and 1 month after treatment. The synovial membrane volume was significantly reduced (median -52%) in all 9 patients brought into clinical remission (p<0.01), while no significant change was found in patients with clinical relapse. The early synovial enhancement was not significantly changed. MRI revealed progressive erosive changes in 2 patients. The time of relapse was correlated to a MR-erosion score, but not to early synovial enhancement or volumes of synovium or effusion (Spearman tests). MRI-determined synovial membrane volumes and early synovial enhancement may be objective quantitative markers of inflammation. MR-scores of cartilage and bone erosions are sensitive to progressive changes occurring within a month.

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