髌股关节紊乱的MRI表现与临床

Clinical study of MR imaging of patellofemoral joint disorder

目的:探讨髌股关节紊乱(PFD)的MRI表现。方法:膝关节正常组6例(10个膝)及病例组42例(70个膝)受试者均行MRI检查,对病理性髌股关系及髌骨支持带的表现进行分析。结果:所有病例(70个膝)髌骨外侧半脱位程度6～15 mm,60%为双侧。其他恒定的异常包括股骨滑车发育不良、髌骨内侧支持带薄、髌外侧支持带增厚以及髌股轨迹失常所致的创伤改变。除1例外,其余患者均经MRI确诊。结论:髌骨内侧支持带、股骨滑车发育缺陷可为PFD的主要形成因素,MRI检查可作为PFD诊断和治疗以及预后判断的首选检查方法。

Objective：To study the MRI appearances of patellofemoral joint disorder（PFD）.Methods：6 volunteers with no patellofemoral joint symptoms were selected as the control group（10 knees）,42 patients with PFD（70 knees） also underwent MR examination,the MRI appearances of disordered patellofemoral relationship and patella retinaculum were studied.Results：All of the 70 disordered knee joints showed lateral subluxation of patella ranged from 6~15mm,and 60% of them were bilateral subluxation.The other abnormal appearances included：dysplasia of femoral trochlea,thinning of medial patellar retinaculum,thickening of lateral patellar retinaculum and traumatic changes caused by abnormal patellofemoral maltracking.Definite diagnosis was made with MRI except 1 case.Conclusion：Development anomaly of medial patella retinaculum and femoral trochlea are the principal causes of PFD,MRI might used as the first choice of imaging modality for the diagnosis,treatment planning and prognosis prediction.