CRP and juvenile polyposis syndrome: Despite the suggestion of several biomarkers, including C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR), for the diagnosis of chronic PJI, as recommended by the Musculoskeletal Infection Society (MSIS), there are still no well-documented and reliable biomarkers that could help surgeons obtain the right and timely preoperative diagnosis [1, 6].