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Meniscal flounce MR imaging

J S Yu1, A J Cosgarea, C C Kaeding

  • 1Department of Radiology, Ohio State University Medical Center, Columbus 43210, USA.

Radiology
|May 1, 1997
PubMed
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A meniscal flounce, an S-shaped fold in knee cartilage, is a normal variant in 0.2% of cases. Its presence does not increase the risk of a meniscal tear, though tears can mimic this finding.

Area of Science:

  • Orthopedic imaging
  • Radiology
  • Knee anatomy

Background:

  • Meniscal flounces are folds in the free edge of menisci.
  • Their association with meniscal tears requires clarification.
  • Magnetic resonance (MR) imaging is crucial for knee joint evaluation.

Purpose of the Study:

  • Determine the prevalence of meniscal flounces on MR imaging.
  • Characterize the MR imaging features of meniscal flounces.
  • Investigate the association between meniscal flounces and meniscal tears.

Main Methods:

  • Prospective evaluation of 3,159 knee MR examinations.
  • Inclusion of ten patients with S-shaped folds in the meniscus.
  • Arthroscopic surgery for five patients to confirm findings.

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Main Results:

  • Prevalence of meniscal flounce was 0.2% (6/3,159 examinations).
  • Flounces occurred in the medial and lateral menisci, appearing truncated coronally.
  • Four meniscal tears presented with flouncelike folds; three confirmed surgically.

Conclusions:

  • A meniscal flounce is a normal variant when not associated with a tear.
  • The presence of a flounce does not elevate the risk of a meniscal tear.
  • Distinguish flounces from tear-associated folds based on other imaging indicators.