急性化脓性膝关节炎关节软骨病损的MRI表现

MRI Appearances of Articular Cartilaginous Lesions in Acute Pyogenic Arthritis of Knee Joint

目的:探讨急性化脓性膝关节炎关节软骨损伤的MRI表现。方法:分析16例急性化脓性膝关节炎患者的MRI表现,重点观察关节软骨改变,与关节镜手术或关节切开手术所见对照。结果:16例病变关节的关节软骨MRI均清楚显示,其中4例关节软骨MRI表现正常(0级),12例见软骨信号异常和(或)软骨变薄、软骨表面不光滑改变(Ⅰ～Ⅱ级),其中出现软骨局部全层缺如者2例(Ⅲ级),与手术对照具有较好的一致性。同时,MRI可发现软骨下骨水肿、关节周围软组织肿胀及关节积液等改变。结论:MRI能够准确评价急性化脓性膝关节炎关节软骨的病损部位、程度,对临床治疗有重要的指导意义。

Objective：To evaluate the MRI manifestations of articular cartilaginous lesions in acute pyogenic arthritis of knee joint. Methods：MRI appearances of 16 patients with acute pyogenic arthritis of knee joint were analyzed, the cartilaginous changes were mainly studied and correlated with arthroscopy and arthrotomy findings. Results： Of the 16 patients having MRI,the articular cartilage were clearly showed. There were normal cartilage （Grade 0） in 4 patients,abnormal cartilage signal intensities and/or thinning or roughness of cartilage surface in 12 patients （Grade Ⅰ～Ⅱ ）,and focal full-thickness disappearance of articular cartilage in 2 patients （Grade Ⅲ ）, which were in consistence with the operation findings. Sub chondral bone edema, peri articular soft tissue swelling and hydrarthrosis could also be assessed on MR imaging. Conclusion：The position and degree of articular cartilaginous lesions in acute pyogenic arthritis of knee joint could be accurately revealed on MRI,which is useful in treatment guidance in clinical application.