Semin Musculoskelet Radiol 2018; 22(04): 424-434
DOI: 10.1055/s-0038-1653956
Review Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Postoperative Imaging of the Knee Extensor Mechanism

Jeremiah R. Long
1   Division of Musculoskeletal Radiology, Mallinckrodt Institute of Radiology, Saint Louis, Missouri
,
David A. Rubin
1   Division of Musculoskeletal Radiology, Mallinckrodt Institute of Radiology, Saint Louis, Missouri
› Author Affiliations
Further Information

Publication History

Publication Date:
22 August 2018 (online)

Abstract

The extensor mechanism of the knee plays an important role in many movements of the lower extremity. Although its main function is to extend the knee, it also stabilizes the patellofemoral joint and resists passive flexion of the knee when landing from jumping. Pathologic conditions of the extensor mechanism can be acute or chronic, and they can negatively affect daily activities. Fortunately, many surgical treatments are available aimed at restoring function to the injured extensor mechanism. Understanding the surgical techniques and common complications of these procedures enables the radiologist to recognize expected and unexpected postoperative imaging appearances.

 
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