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Semin Musculoskelet Radiol 2024; 28(03): 257-266
DOI: 10.1055/s-0044-1785538
Review Article

Patellar Instability: Imaging Findings

Anthony De Leeuw 
1   Department of Musculoskeletal Imaging, University of Lille, CHU Lille, Lille, France
,
Souhir Abidi
1   Department of Musculoskeletal Imaging, University of Lille, CHU Lille, Lille, France
,
Laura Scarciolla
1   Department of Musculoskeletal Imaging, University of Lille, CHU Lille, Lille, France
,
Dunkan Petersbourg
1   Department of Musculoskeletal Imaging, University of Lille, CHU Lille, Lille, France
,
Sophie Putman
2   Department of Orthopedic Surgery, University of Lille, CHU Lille, Lille, France
,
Anne Cotten
1   Department of Musculoskeletal Imaging, University of Lille, CHU Lille, Lille, France
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Abstract

Patellofemoral instability results from impaired engagement of the patella in the trochlear groove at the start of flexion and may lead to pain and lateral patellar dislocation. It occurs most frequently in adolescents and young adults during sporting activities. Trochlear dysplasia, patella alta, and excessive lateralization of the tibial tuberosity are the most common risk factors for patellar instability. The main role of imaging is to depict and assess these anatomical factors and highlight features indicating previous lateral dislocation of the patella.

Keywords

patellar instability - patellar dislocation - trochlear dysplasia - patella alta - tibial tubercle to trochlear groove distance


Publication History

Article published online:
20 May 2024

© 2024. Thieme. All rights reserved.

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