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Normal and abnormal medial meniscocapsular structures: MR imaging and sonography in cadavers
M De Maeseneer1, L Lenchik, M Starok
1Department of Radiology, Veterans Administration Medical Center, San Diego, CA 92161, USA.
AJR. American Journal of Roentgenology
|October 8, 1998
Summary
Magnetic resonance (MR) imaging and MR arthrography can identify meniscocapsular separation by showing fluid or contrast between the meniscus and medial collateral ligament (MCL). Sonography is not effective for diagnosing this knee injury.
Area of Science:
- Orthopedics
- Radiology
- Anatomy
Background:
- Meniscocapsular separation is a knee injury that can be difficult to diagnose.
- Accurate diagnosis is crucial for appropriate treatment and patient outcomes.
Purpose of the Study:
- To establish imaging criteria for diagnosing meniscocapsular separation.
- To correlate findings from MR imaging, MR arthrography, and sonography with anatomical specimens.
Main Methods:
- Eight cadaveric knee specimens were imaged using MR, MR arthrography, and sonography.
- Specific knee lesions, including meniscocapsular separation and medial collateral ligament (MCL) tears, were created arthroscopically.
- Imaging studies were repeated post-arthroscopy, followed by anatomical sectioning for correlation.
Main Results:
- MR imaging showed meniscocapsular separation with interposition of fluid, irregular meniscal outline, or increased meniscus-MCL distance.
- MR arthrography identified meniscocapsular separation via interposition of contrast medium.
- Sonography visualized MCL lesions but failed to detect meniscocapsular separations.
Conclusions:
- MR imaging and MR arthrography provide valuable criteria for diagnosing meniscocapsular separation.
- Sonography is not a reliable method for diagnosing meniscocapsular separation.
- Imaging findings, particularly fluid or contrast interposition, are key indicators of meniscocapsular separation.