MRI诊断半月板囊肿的价值及临床意义

目的 分析半月板囊肿的MRI表现,评价MRI诊断半月板囊肿的价值及临床意义.资料与方法 回顾性分析经手术病理证实的34例半月板囊肿患者的MRI表现,探讨半月板囊肿部位、形态、信号特征及其与半月板的毗邻关系.结果 34例半月板囊肿(内、外侧半月板囊肿发生比率为1:2.4),包括:半月板旁型囊肿25例(73.5%),半月板内型囊肿4例(11.8%),滑膜囊肿5例(14.7%).半月板囊肿多呈类圆形的囊性肿块,边缘光滑锐利,信号均匀,SE-T_1WI呈等或稍低信号,TSE-T_2WI呈稍高信号,MEDIC呈高信号,其中半月板旁型囊肿的典型表现呈"吹气球征".结论 MRI能够对膝关节半月板囊肿进行准确定位、分型,并清晰显示其与半月板的毗邻关系.因此,MRI检查可作为评价半月板囊肿的首选方法,对半月板囊肿的治疗具有重要指导意义.

The Value and Clinical Significance of MRI Diagnosing Meniscal Cysts of the Knee

Objective To analyze MR imaging manifestations of meniscal cysts,and to assess the value and clinical significant of MRI in the detection of meniscal cysts of knee.Materials and Methods MRI manifestations of 34 cases with meniscal cysts proved by surgery and pathology were analyzed retrospectively.The location and shape of meniscal cysts,and relationship with meniscuses were reviewed.Results Meniscal cysts occured at the lateral meniscns more commonly than at the medial one with the ratio 2.4:1.(Among 34 cases,there were 25 para-articular meniscal cysts,4 intra-articular meniscal cysts,and 5 synovial cysts to be foud on MRI.)Meniscal cysts were characteristic by cystic masses with smooth outline,homogeneous attenuation,slightly low or intermediate signal intensity in SE-T_1WI,slightly increased signal intensity in TSE-T_2WI and increased signal intensity in MEDIC sequence.The blowing balloon sign was a typical manifestation of meniscal cysts of the knee joint in MRI.Conclusion MRI can confirm the location and the type of meniscal cysts,to determine the adjacent relationship with meniscus.MR imaging has an important impact on clinical treatment of patients,which can be served as a preferred examination method for the meniscal cyst of the knee joint.