CRP and juvenile polyposis syndrome: Case 5 was a 66 years-old female who was diagnosed as having PJI because of the presence of the sinus tract and her CRP was 65 mg/L, ESR was 8.07 mm/h and the analysis of synovial fluid revealed that the white blood cell count was 9,144 × 106/L with 75.9% being neutrophils at this point.