Further evaluation of the combined diagnostic value of joint fluid IL-6 combined with PMN% for chronic PJI showed a sensitivity of 96.67% (80.95 to 99.83%), specificity of 93.33% (76.49 to 98.84%), and accuracy of 95.00% for the diagnosis of chronic PJI (Table 3). This evidence concerns the gene IL6 and juvenile polyposis syndrome.