不同前交叉韧带撕裂类型中半月板ramp损伤的发生率：一项磁共振成像研究
简介
本研究通过MRI评估了ACL损伤患者中半月板ramp lesion的患病率及其分型，并分析了其与ACL撕裂类型的关系。回顾性分析了122例关节镜下ACL重建术前患者的MRI资料。结果显示，两位阅片者分别检出74.6%和77.0%的患者存在ramp lesion。与选择性单束撕裂相比，ACL双束撕裂中ramp lesion的检出率显著更高（分别为84.0% v…
英文摘要
PURPOSE: Meniscal ramp lesions are frequently associated with anterior cruciate ligament (ACL) injuries but may be overlooked during arthroscopy, potentially affecting surgical planning and outcomes. This study aimed to evaluate the prevalence and types of meniscal ramp lesions on magnetic resonance (MR) imaging and to assess the relationship with ACL tear patterns and clinical variables. METHODS: This retrospective study included 122 patients who underwent knee MR imaging before arthroscopic ACL reconstruction. ACL tears were classified as both-bundle or selective bundle tears based on arthroscopic findings. Meniscal ramp lesions were classified into 5 subtypes on MR imaging. Associations among meniscal ramp lesion prevalence, lesion subtype, ACL tear pattern, and clinical variables, including body mass index, were analyzed. RESULTS: Meniscal ramp lesions were detected in 74.6% and 77.0% of patients by reader 1 and reader 2, respectively. Meniscal ramp lesions were significantly more frequent in both-bundle ACL tears than in selective bundle tears (84.0% vs. 56.1% for reader 1; 84.0% vs. 63.4% for reader 2; P<0.05). There was no significant difference in ramp lesion prevalence between anteromedial and posterolateral bundle tears or in ramp lesion subtype distribution according to ACL tear pattern. CONCLUSIONS: Meniscal ramp lesions are highly prevalent in patients with ACL tears and occur more frequently in both-bundle tears. MR imaging plays a critical role in detecting ramp lesions and may improve preoperative assessment and surgical planning.