Ultrasound assessment of new onset bilateral painful shoulder in patients with polymyalgia rheumatica and rheumatoid arthritis
Clinical Rheumatology, 06/12/2012
Ruta S et al. – Ultrasound (US)–detected periarticular inflammatory involvement more frequently in polymyalgia rheumatica (PMR) both unilaterally and bilaterally and intra–articular inflammatory involvement was commonly in rheumatoid arthritis (RA) but only unilaterally.
Thirty patients with PMR, 30 with RA, and 60 controls were included for a total of 60 shoulders per group.
Unilateral subacromial–subdeltoid (SAD) bursitis and long head biceps (LHB) tenosynovitis were significantly more frequent in patients with PMR when compared to those with RA (p < 0.0001 and p < 0.01, respectively) and controls (p < 0.001 and p < 0.01, respectively).
Unilateral gleno–humeral (GH) synovitis was more common in RA than in PMR and controls (p < 0.05 and p < 0.01, respectively).
Bilateral SAD bursitis was significantly more frequent in patients with PMR than in those with RA (p < 0.01) as was bilateral LHB tenosynovitis (p < 0.01).
No significant differences were found in bilateral GH synovitis.
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