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  • Title: Diagnostic significance of increased serum hyaluronic acid in juvenile rheumatoid arthritis.
    Author: Shigemori M, Takei S, Imanaka H, Maeno N, Hokonohara M, Miyata K.
    Journal: Pediatr Int; 2002 Aug; 44(4):394-9. PubMed ID: 12139564.
    Abstract:
    BACKGROUND: We have previously reported that serum levels of hyaluronic acid (HA) objectively reflect the severity of arthritis in juvenile rheumatoid arthritis (JRA). However, clear diagnostic standards do not exist for JRA; it is difficult to evaluate arthritis in children, particularly in small children and the diagnostic criteria for JRA requires an exclusion of several diseases. Therefore, if a specific test finding associated with JRA could be established, it would enable general pediatricians to make an objective diagnosis. METHODS: We measured the serum HA levels in children with joint symptoms as a chief complaint. The total number of subjects were 197 children; of these 89 had JRA, 39 had rheumatic diseases other than JRA, and 69 had non-rheumatic diseases (including systemic 31, polyarticular 40 and pauci-articular in 17), rheumatic diseases other than JRA in 39 subjects, and non-rheumatic diseases in 69 subjects. Sandwich enzyme-linked immunosorbent assay measured HA by using the HA binding protein. RESULTS: The serum level of HA was significantly higher in systemic and polyarticular JRA patients than in patients with pauci-articular JRA, with rheumatic diseases other than JRA, and non-rheumatic patients. With a cut-off value of 100 ng/mL, a diagnostic value of HA in all JRA patients was 48.3% sensitivity and 98.1% specificity. CONCLUSIONS: In children presenting with joint symptoms, serum HA measurement is useful for diagnosing systemic and polyarticular JRA.
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