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MR evaluation of mediopatellar plica
K Nakanishi1, M Inoue, T Ishida
1Department of Radiology, Osaka University Medical School, Japan.
Acta Radiologica (Stockholm, Sweden : 1987)
|July 1, 1996
Summary
Magnetic resonance (MR) imaging effectively diagnoses mediopatellar plica (MP) in the knee. This non-invasive technique aids in evaluating MP extension and serves as a valuable pre-arthroscopy screening tool.
Area of Science:
- Orthopedic imaging
- Knee joint pathology
- Diagnostic radiology
Background:
- Mediopatellar plica (MP) is a common intra-articular anomaly in the knee.
- Accurate diagnosis of MP is crucial for effective treatment planning.
- Conventional diagnostic methods may have limitations in visualizing MP.
Purpose of the Study:
- To evaluate the diagnostic utility of magnetic resonance (MR) imaging for mediopatellar plica (MP) of the knee.
- To assess MR imaging's ability to detect and characterize MP.
- To compare MR findings with arthroscopic results.
Main Methods:
- Prospective study of MR imaging in 40 knee joints from 30 symptomatic patients.
- Utilized SE T1-weighted, T2-weighted, and FLASH pulse sequences.
- Defined MP as a low-intensity band above the medial femoral condyle on T1 and T2-weighted images.
- Correlated MR findings with arthroscopic evaluation and the SAKAKIBARA classification.
Main Results:
- MR imaging correctly diagnosed MP in 27 out of 29 knees where it was arthroscopically confirmed.
- MR imaging correctly identified MP absence in 9 out of 11 knees without arthroscopic evidence of MP.
- Overall diagnostic accuracy demonstrated the efficacy of MR imaging.
Conclusions:
- MR imaging is a valuable tool for detecting mediopatellar plica (MP).
- MR imaging aids in evaluating the extent of MP, providing crucial pre-operative information.
- MR imaging serves as a useful screening modality prior to arthroscopy for suspected MP.