In a diagnostic test accuracy meta-analysis of laboratory tests for GCA, van der Geest et al. reported that platelet count exhibited a low sensitivity (45.8%) and high specificity (87.8%), that CRP exhibited a high sensitivity (87.4%) and low specificity (31.4%), and that ESR exhibited a high sensitivity (82.6 to 93.2% depending on definitions of >20 mm/h to >60 mm/h) and low specificity (33.8 to 70.5% depending on definitions of >20 mm/h to >60 mm/h) [9]. Here, CRP is linked to temporal arteritis.