Department of Diagnostic Radiology, Khoo Teck Puat Hospital, 90 Yishun Central, Singapore.
Singapore Med J. 2012 Sep;53(9):625-31; quiz 632.
A 38-year-old man presented with right knee pain and swelling following a football injury. Magnetic resonance (MR) imaging showed a complete anterior cruciate ligament (ACL) tear and lateral meniscal tears. The torn ACL was repaired with a graft obtained from the semitendinosus muscle, and the menisci were debrided. The mechanisms of injury to the ACL are varied and may be due to direct or indirect contact with the knee as well as with twisting injuries. Knowledge of the ACL's normal anatomy, together with MR imaging technique and understanding of the appearance of the lesion on MR examination, is crucial to aid in the identification of an ACL tear. Diagnosis of an ACL tear should be based on direct MR imaging signs, although indirect signs may be helpful, particularly in chronic tears. Other associated injuries to be aware of include meniscal and other ligamentous injuries. Normal ACL graft and post-ACL graft reconstruction complications are also briefly discussed.
一位 38 岁男性，在足球受伤后出现右膝疼痛和肿胀。磁共振成像（MR）显示完全性前交叉韧带（ACL）撕裂和外侧半月板撕裂。撕裂的 ACL 用取自半腱肌的移植物修复，半月板切除。ACL 的损伤机制多种多样，可能是由于膝关节的直接或间接接触以及扭转损伤。了解 ACL 的正常解剖结构，以及 MR 成像技术和对 MR 检查中病变表现的理解，对于帮助识别 ACL 撕裂至关重要。ACL 撕裂的诊断应基于直接的 MR 成像征象，尽管间接征象可能有帮助，特别是在慢性撕裂中。还需要注意其他相关损伤，包括半月板和其他韧带损伤。正常的 ACL 移植物和 ACL 重建后的并发症也将简要讨论。
