The diagnosis of polymyalgia rheumatica (PMR) is mostly clinical and it is supported with specific findings on laboratory tests and ultrasound of the affected joints.  The European League Against Rheumatism/American College of Rheumatology collaborative initiative developed a provisional classification criteria for PMR.  The following criteria are required for the diagnosis of PMR: age more than 50 years, bilateral shoulder pain, and elevated C-reactive protein (CRP) and/or erythrocyte sedimentation rate (ESR).
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