急性髌骨一过性外侧脱位的MRI诊断

MRI Diagnosis of Acute Transient Lateral Patella Dislocation

目的:探讨MRI在急性髌骨一过性外侧脱位(TLPD)中的诊断优势。方法:回顾性分析2018年1月至2020年10月50例TLPD患者的影像学资料,重点分析其MRI表现特征及与X线平片比较优势。结果:TLPD在MRI上以股骨外侧髁与髌骨内侧骨髓水肿及内侧髌股韧带不同程度损伤为特征,多伴髌骨半脱位及外倾(本组84%)、关节腔(本组100%)及髌周滑囊积液(本组100%),可伴骨软骨损伤(34%)。本组MRI诊断率(100%)明显高于X线(22%),差异具有统计学意义(χ^(2)=63.9344,P<0.01)。结论:MRI易于显示TLPD的病变特征,可作为首选的影像学成像手段。

Objective:To explore the diagnostic advantages of MRI in acute transient lateral patella dislocation(TLPD).Methods:The imaging data of 50 patients diagnosed as TLPD from January 2018 to October 2020 were retrospectively analyzed.The MRI features and comparative advantages from X-ray plain radiographs were explored.Results:On MRI,TLPD was characterized by edema of the lateral femoral condyle and the inner patella and injury of the medial patellofemoral ligament at different degrees.It was mostly accompanied by patellar supracrustal dislocation and camber(n=84%),effusion of articular cavity(n=100%)and peripatellar bursa(n=100%),and partly with osteochondral lesion(n=34%).The diagnostic rate of MRI in this group(100%)was significantly higher than that in X-ray(22%),and the difference was statistically significant(χ^(2)=63.9344,P<0.01).Conclusion:MRI is easy to display the pathological features of TLPD and can be used as the first choice imaging method.