Department of Biomedical Sciences for Health, Università Degli Studi di Milano, Milan, Italy.
Department of Biomedical, Surgical and Dental Sciences, Università Degli Studi di Milano, Milan, Italy.
Semin Musculoskelet Radiol. 2024 Jun;28(3):318-326. doi: 10.1055/s-0044-1779718. Epub 2024 May 20.
The posteromedial corner (PMC) of the knee is an anatomical region formed by ligamentous structures (medial collateral ligament, posterior oblique ligament, oblique popliteal ligament), the semimembranosus tendon and its expansions, the posteromedial joint capsule, and the posterior horn of the medial meniscus. Injuries to the structures of the PMC frequently occur in acute knee trauma in association with other ligamentous or meniscal tears. The correct assessment of PMC injuries is crucial because the deficiency of these supporting structures can lead to anteromedial rotation instability or the failure of cruciate ligaments grafts. This article reviews the anatomy and biomechanics of the PMC to aid radiologists in identifying injuries potentially involving PMC components.
膝关节后内侧角（PMC）是由韧带结构（内侧副韧带、后斜韧带、斜向腘韧带）、半膜肌腱及其扩张部、后内侧关节囊和内侧半月板后角形成的解剖区域。在急性膝关节创伤中，与其他韧带或半月板撕裂一起，这些 PMC 结构的损伤经常发生。正确评估 PMC 损伤至关重要，因为这些支撑结构的缺失会导致前内侧旋转不稳定或十字韧带移植物失效。本文回顾了 PMC 的解剖和生物力学，以帮助放射科医生识别可能涉及 PMC 成分的损伤。
