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The McMurray test is used to evaluate patients with meniscal tears of the knee.Analysis of the sensitivity and specificity of McMurray test and the correlation between McMurray sign and postoperative outcomes is helpful to screen the candidates for arthroscopic meniscectomy.The present study compares the results of McMurray test with arthroscopic examination in patients with knee osteoarthritis.We studied 149 patients diagnosed as meniscal lesion with osteoarthritis by radiology and had arthroscopic surgery.Our data show that positive McMurray sign implies good postoperative outcomes for the patients with meniscal tear associated with osteoarthritis.For patients with osteoarthritis, those whose positive McMurray signs are in line with their radiological findings indicates they are eligible candidates for arthroscopic meniscectomy.Our study suggests that McMurray sign can be used an indication for both symptomatic meniscal tear and postoperative outcomes.