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Patellofemoral Instability: Evaluation by Magnetic Resonance Imaging
Patrícia Martins E Souza1, Marcelo Sadock de Sá Gabetto2, Marcelo Ganem Serrão3
1MD, MSc and PhD in Radiology from Instituto D'Or de Ensino e Pesquisa, and Radiologist in Grupo Fleury and Instituto Nacional de Traumatologia e Ortopedia, Rio de Janeiro, RJ, Brazil.
Revista Brasileira De Ortopedia
|June 19, 2019
Summary
Magnetic resonance imaging (MRI) effectively identifies bone, cartilage, and ligament issues in patients with patellar instability. This diagnostic tool aids in detecting predisposing factors for chronic patellofemoral instability.
Area of Science:
- Orthopedic imaging
- Radiology
- Knee biomechanics
Background:
- Patellofemoral instability is a common orthopedic condition.
- Accurate diagnosis of underlying causes is crucial for effective treatment.
Purpose of the Study:
- To evaluate the utility of magnetic resonance imaging (MRI) in diagnosing patellofemoral instability.
- To identify specific abnormalities contributing to patellar instability using MRI.
Main Methods:
- Retrospective analysis of 45 knee MRIs from 39 patients with patellar instability.
- Assessment for bone abnormalities, hyaline cartilage damage, soft-tissue injuries (including MPFL), and anatomical variants.
Main Results:
- High prevalence of abnormalities detected: 44% bone changes, 64% cartilaginous injuries, 29% medial patellofemoral ligament (MPFL) disruption, 73% joint morphology abnormalities.
- Additional findings included meniscal tears (4%) and fibular fracture (2%).
Conclusions:
- MRI is a valuable tool for detecting predisposing factors in patellofemoral instability.
- MRI enables comprehensive diagnosis of bone, cartilage, ligamentous, and meniscal abnormalities contributing to instability.
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