New arguments for a vasculitic nature of polymyalgia rheumatica using positron emission tomography

  • Blockmans D
  • Maes A
  • Stroobants S
 et al. 
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Objective. To study the possible contribution of fluorodeoxyglucose (FDG)-positron emission tomography (PET) in the diagnosis of giant cell arteritis and polymyalgia rheumatica. Methods. A consecutive case series consisting of five patients with polymyalgia rheumatica, six patients with temporal arteritis and 23 age-matched patients with other inflammatory conditions were evaluated with FDG-PET. Studies were performed before therapy with steroids was started. Results. A total of 4/6 patients with giant cell arteritis and 4/5 patients with polymyalgia had increased FDG uptake in their thoracic vessels, compared to 1/23 controls (P < 0.001). Increased vascular FDG uptake in the upper legs was seen in 8/11 patients with giant cell arteritis or polymyalgia compared to 8/23 control patients (P < 0.05), and in the lower legs in 6/11 patients compared to 6/23 controls (P = not significant). Conclusions. FDG-PET scan is the first non-invasive technique which may indicate large-vessel vasculitis and which can show its extension throughout the body. It strongly suggests that polymyalgia rheumatica is a form of vasculitis.

Author-supplied keywords

  • FDG-PET scan
  • Giant cell arteritis
  • Polymyalgia rheumatica
  • Vasculitis

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  • D. Blockmans

  • A. Maes

  • S. Stroobants

  • J. Nuyts

  • G. Bormans

  • D. Knockaert

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