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[MRI of discoid lateral meniscus]
Y Araki1, M Ootani, T Furukawa
1Department of Radiology, Osaka Rosai Hospital.
Nihon Igaku Hoshasen Gakkai Zasshi. Nippon Acta Radiologica
|October 25, 1991
Summary
Magnetic resonance imaging (MRI) can diagnose discoid lateral meniscus in the knee. Key measurements include transverse diameter exceeding 15 mm or a proportion to tibia width over 20%.
Area of Science:
- Orthopedic imaging
- Knee joint anatomy
Context:
- Magnetic resonance imaging (MRI) is increasingly utilized for knee joint evaluation.
- Establishing reliable MRI criteria for diagnosing discoid lateral meniscus is essential due to its rising detection rates.
Purpose:
- To define specific MRI criteria for the accurate diagnosis of discoid lateral meniscus.
- To establish numerical measurements for identifying discoid menisci on MRI scans.
Summary:
- Retrospective review of 10 patients (17 knees) with surgically confirmed discoid lateral meniscus.
- Key MRI measurements identified: average transverse diameter of 21.9 mm (normal 8.6 mm) and proportion to tibial width of 29.4% (normal 12.0%).
- Transverse diameter >15 mm or proportion to tibial width >20% reliably indicates a discoid lateral meniscus.
Impact:
- Provides definitive MRI criteria for diagnosing discoid lateral meniscus, aiding clinical decision-making.
- Enhances diagnostic accuracy in knee MRI interpretation, potentially reducing misdiagnosis.
- Facilitates earlier and more precise identification of this meniscal anomaly.