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[目的]报告儿童症状性外侧盘状半月板患者前交叉韧带(anterior cruciate ligment,ACL)形态及信号的变化特征。[方法]自2008年3月~2012年5月经关节镜及核磁共振成像(magnatic resonance imaging,MRI)证实的儿童症状性外侧盘状半月板36膝(外侧盘状半月板组),以及经MRI证实的外侧半月板形态正常儿童35膝(对照组)被纳入本研究。应用GE Healthcare Centricity RIS/PACKS系统分别测量两组病例在MRI冠状面及矢状面上ACL长度、下止点宽度及体部宽度。比较两组病例ACL形态及信号变化的特征。[结果]外侧盘状半月板组冠状面ACL体部宽度明显小于对照组(t=3.733,P=0.001);而矢状面ACL长度、下止点及体部宽度及冠状面ACL长度、下止点宽度与对照组比较差异无统计学意义。外侧盘状半月板组正常ACL走行及形态发生率明显低于对照组(x2=13.019,P=0.001);而外侧盘状半月板组在冠状面(x2=12.776,P=0.001)及矢状面(x2=10.271,P=0.001)异常ACL走行及形态发生率均明显高于对照组。与对照组比较,外侧盘状半月板组ACL异常信号发生率增高(x2=5.418,P=0.020)。[结论]儿童症状性外侧盘状半月板可以引发ACL的MRI影像上的形态改变和信号异常。
[Objective] To report the changes of morphology and signal of anterior cruciate ligment (ACL) in children with symptomatic lateral discoid meniscus. [Methods] From March 2008 to May 2012, 36 knees (lateral discoid meniscus group) with symptomatic lateral discoid meniscus confirmed by arthroscopy and magnetic resonance imaging (MRI) Confirmed 35 cases of lateral meniscus morphology normal children (control group) were included in this study. The length of ACL, the width of the bottom dead center and the width of the body in the coronal and sagittal planes were measured by GE Healthcare Centricity RIS / PACKS system. The characteristics of ACL morphology and signal changes in two groups were compared. [Results] The width of the coronal ACL body in the lateral discoid meniscus group was significantly smaller than that in the control group (t = 3.733, P = 0.001); while the sagittal ACL length, bottom dead center, body width and coronal ACL length There was no significant difference between the stop point width and the control group. The normal ACL morphology and morphology in the lateral discoid meniscus group were significantly lower than those in the control group (x2 = 13.019, P = 0.001); while in the lateral discoid meniscus group, there was no significant difference in the coronal plane (x2 = 12.776, P = 0.001) Surface (x2 = 10.271, P = 0.001) abnormal ACL walking and morphology were significantly higher than the control group. Compared with the control group, the incidence of ACL abnormalities increased in the lateral discoid meniscus group (x2 = 5.418, P = 0.020). [Conclusion] Children ’s symptomatic lateral discoid meniscus can induce morphological changes and signal abnormalities on MRI images of ACL.