Clinical Application Of MRI In The Assessment Of Medial Ankle Injury

Objective:To evaluate the clinical value of magnetic resonance imaging（MRI）in the risk of medial ankle impingement syndrome and ankle instability and prognosis of medial ankle injury for patients.Material and Methods:The clinical and imaging data of 104 patients with medial ankle injury were collected in China-Japan Friendship Hospital of Jilin University from March 2020 to October 2021.A classification of the information from these patients in the clinical data including sex,age,weight,height,body mass index（BMI）,tenderness point,sprain movement,sprained again and the magnetic resonance imaging data including ankle deltoid ligament injury,cartilage lesion,synovium proliferation and bone marrow edema.Based on gender,all patients were divided into two groups,43males and 61 females,and the differences of clinical and imaging data between the two groups were compared.Correlation analysis were performed by Chi-square test（X~2-test）,including the correlation between the bone marrow edema of distal tibial and synovial proliferation,ankle sprain again and deltoid ligament injury,synovial proliferation and cartilage lesions of distal tibial cartilage and talus trochlear.And all patients were divided into two groups according to whether the sprain occurred again,and the difference of BMI between the two groups was analyzed by t-test.Single factors including triangular ligament injury,BMI,age,sex,synovium thickening and cartilage injury were put into binary logistic regression model to analyze the important factors for ankle stability.Results:A significant correlation between the bone marrow edema of distal tibial and synovial proliferation（P<0.05）was observed,which suggested that the more severe the imaging manifestation of bone marrow edema for distal tibial in patients with medial ankle injury,the more severe the synovial proliferation.Moreover,because of synovial proliferation was considered to be the main characteristic imaging manifestation of ankle impingement syndrome,bone marrow edema of distal tibial on MRI display may indicate the occurrence of ankle impingement syndrome.A significant correlation between ankle sprain again and deltoid ligament injury（P<0.05）was found,which suggested that ankle instability may increase after ankle triangular ligament injury.Consequently,the risk of recurrent sprain was higher.There was a significant correlation between BMI and ankle sprain（P<0.05）,which suggested that the higher the BMI value,the higher the risk of recurrent sprain.This study found that there was a significant correlation between synovial proliferation and distal tibial cartilage lesion（P<0.05）,but there was no significant difference between synovial proliferation and talus trochlear cartilage lesion（P>0.05）.Conclusion:The MRI findings of 104 patients with medial ankle injury were analyzed retrospectively,which suggested that different degrees of lesions such as deltoid ligament injury,synovial proliferation and cartilage lesion may be observed clearly on MRI,and thus the above tissue injuries may reflect the stability of ankle joint.Combined with other factors,the risk of recurrent ankle sprain can be predicted.In summary,MRI has clinical value in the diagnosis and prognosis of patients with medial ankle injury.