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Semin Musculoskelet Radiol 2024; 28(03): 318-326
DOI: 10.1055/s-0044-1779718
Review Article

Posteromedial Corner Injuries of the Knee: Imaging Findings

Stefano Fusco
1   Department of Biomedical Sciences for Health, Università Degli Studi di Milano, Milan, Italy
,
Domenico Albano
2   Department of Biomedical, Surgical and Dental Sciences, Università Degli Studi di Milano, Milan, Italy
3   IRCCS Istituto Ortopedico Galeazzi, Milan, Italy
,
Salvatore Gitto
1   Department of Biomedical Sciences for Health, Università Degli Studi di Milano, Milan, Italy
3   IRCCS Istituto Ortopedico Galeazzi, Milan, Italy
,
Francesca Serpi
1   Department of Biomedical Sciences for Health, Università Degli Studi di Milano, Milan, Italy
,
Carmelo Messina
1   Department of Biomedical Sciences for Health, Università Degli Studi di Milano, Milan, Italy
3   IRCCS Istituto Ortopedico Galeazzi, Milan, Italy
,
Luca Maria Sconfienza 
1   Department of Biomedical Sciences for Health, Università Degli Studi di Milano, Milan, Italy
3   IRCCS Istituto Ortopedico Galeazzi, Milan, Italy
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Abstract

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.

Keywords

posteromedial corner - knee magnetic resonance imaging - multiligamentous knee injury - anteromedial rotation instability


Publication History

Article published online:
20 May 2024

© 2024. Thieme. All rights reserved.

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