Correlation of knee medial collateral ligament injuries and bone bruises and medial meniscus tears
Objective To investigate the correlation between superficial medial collateral ligament and meniscofemoral liga-ment injuries and bone bruises as well as the correlation between meniscofemoral ligament injuries and medial meniscus tears.Methods All 325 patients with medial collateral ligament injuries who underwent knee MRI examination from January 2018 to June 2023 were retrospectively analyzed and divided into the bone bruise group(n=165)and non-bone bruise group(n=160)according to the presence or absence of bone bruises in the MRI images to compare the differences in the superficial medial col-lateral ligament and meniscofemoral ligament injuries between two groups.In addition,the patients were also divided into the medial meniscus tear group(n=101)and a non-medial meniscus tear group(n=224)according to the presence or absence of me-dial meniscus tears on MRI images to compare the difference in meniscofemoral ligament injuries between two groups.Results The difference in superficial medial collateral ligament injuries between the bone bruise group and non-bone bruise group was not statistically significant(x2=1.327,P=0.249).The incidence of meniscofemoral ligament injuries in the bone bruise group was higher than that in the non-bone bruise group,with a statistically significant difference(x2=44.977,P<0.00l).The differ-ence between grade 0 meniscofemoral ligament injuries[x2=44.977,P<0.001,95%CI 0.132(0.069,0.252),Phi coefficient-0.372],grade Ⅰ meniscofemoral ligament injuries[x2=18.643,P<0.001,95%CI 0.147(0.055,0.392),Phi coefficient-0.372]and grade Ⅲ meniscofemoral ligament injuries[x2=64.453,P<0.001,95%CI 7.314(4.390,12.183),Phi coefficient 0.445]was statistically significant and correlated.The incidence of meniscofemoral ligament injuries in the medial meniscus tear group was higher than that a non-medial meniscus tear group,with statistically significant difference and correlation[x2=7.418,P=0.006,95%CI 2.378(1.259,4.491),Phi coefficient 0.151].Conclusion Meniscofemoral ligament injuries correlate with bone bruises,with grade Ⅲ meniscofemoral ligament injuries associated with bone bruises to the medial femoral condyle and lateral.In addition,bone bruises are more prevalent in grade Ⅲ meniscofemoral ligament injuries,approximately seven times as preva-lent as in patients without bone bruises,and medial meniscus body and posterior horn tears are correlated with meniscofemoral ligament injuries.