CRP and vasculitis: Vasculitis patients with a positive 18F-FDG-PET/CT scan had significantly higher CRP values than vasculitis patients with a negative 18F-FDG-PET/CT scan (mean CRP = 154.5 mg/L; SD 100.2 mg/L vs 90.4 mg/L; SD 55.6 mg/L, respectively; p=0.018) (Table 3).