青少年急性膝关节软骨损伤的MRI表现

目的 分析青少年急性膝关节软骨损伤的MRI表现.方法 回顾性分析53例(年龄4~27岁)在1个月内有膝关节损伤病史,且经关节镜手术证实的急性膝关节软骨损伤的MRI表现,重点观察软骨、软骨下低信号线和软骨下骨髓的改变.结果 MRI共发现69处软骨损伤,其中髌骨25处,股骨外髁22处,股骨内髁11处,股骨滑车2处,胫骨平台9处.单纯软骨骨折46处,包括软骨全层断裂22处、软骨部分断裂20处及裂隙状软骨骨折4处.骨软骨骨折23处,包括骨软骨撕脱骨折13处和软骨下骨质内陷10处.关节内软骨性游离体6例,骨软骨游离体13例.结论 MRI是急性软骨损伤最好的无创性检查方法.

MRI Findings of Juvenile Acute Articular Cartilage Injury of the Knee Joint

Objective To suty the MRI manifestations of juvenile acute articular cartilage injury of the knee joint.Methods MRI findings of cartilage,subcartilage low signal line and subcarilage bone were analysed retrospectively in 53 juvenile patients (ranged in age from 4~27 years) with acute articular cartilage injury confirmed by arthroscopy.Results Sixty-nine cartilage injuries were showed by MRI in 53 patients,including patellas in 25,femoral lateral condyles in 22,femoral medial condyles in 11,trochlea of the femur in 2,and tibial plateau in 9.Acute articular cartilage injury appeared as pure cartilage fracture in 46, including complete split of the cartilage in 22 sites,partly split of the cartilage in 20 sites,and fissur-like fracture in 4 sites.Osteochondral fracture were observed in 23 sites,including avulsion fracture in 13 and osteochondral subsided in 10.Articular cartilage loose bodies and osteochondral loose bodies were found by MRI in 6 and 13,respectively.Conclusion MRI is the best non-invasive method for studying cartilage injury.