We report a case of compression fracture of anterior margin of medial tibial plateau and medial femoral condyle combined with the posterior cruciate ligament and posterolateral corner disruption. A thirty-seven-year old male had undergone the left knee injury 6 months before. The physical examination revealed positive posterior drawer test and tibial dial test, which evidenced the posterior cruciate ligament and posterolateral corner insufficiency. The plain lateral knee radiographs showed a marginal fracture of the anteromedial tibial plateau and a dimpling on the adjacent part of the medial femoral condyle. On arthroscopy, there were no gross tear of the cruciates, but the posterolateral capsule disclosed stigmata of stretching injury with multiple petechiae and scarring. The compression fracture on the anteromedial side and the stretching injury on the posterolateral side altogether support the mechanism of hyperextension pivoting on the anteromedial side of the knee joint. A small bony lesion around the knee joint should be inspected rigorously with an assumed mechanism of injury for it may herald major ligamentous injury.

译文

我们报告了一例胫骨内侧平台前缘和股骨内侧con合并后交叉韧带和后外侧角断裂的压缩性骨折。一名37岁的男性在6个月前遭受了左膝受伤。体格检查显示后抽屉试验和胫骨表盘试验阳性,证明后交叉韧带和后外侧角功能不全。膝关节外侧x线平片显示胫骨前内侧平台的边缘骨折和股骨内侧con的相邻部分凹陷。在关节镜检查中,十字形没有明显的撕裂,但后外侧囊显示出有多处瘀点和疤痕的拉伸损伤的柱头。前内侧的压缩性骨折和后外侧的拉伸损伤共同支持了膝关节前内侧过度伸展枢转的机制。应严格检查膝关节周围的小骨病变,并假定其损伤机制,因为它可能预示着严重的韧带损伤。

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