IL6 and juvenile polyposis syndrome: The pooled sensitivity, specificity, positive and negative likelihood ratio, DOR, and AUC of serum IL-6 in detecting PJI were 0.76 (0.69–0.81), 0.88 (0.82–0.92), 6.2 (4.3–9.0), 0.28 (0.22–0.35), 22 (14–36), and 0.88 (0.85–0.91), respectively.