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The meniscal flounce: a valuable arthroscopic sign
A M Williams1, P T Myers, M C Watts
1Chelsea and Westminster Hospital, London, UK.
The Knee
|June 30, 2006
Summary
The meniscal flounce is a reliable indicator of meniscus integrity during knee arthroscopy. A normal flounce suggests an intact meniscus, while an abnormal or absent flounce may signal an occult tear.
Area of Science:
- Orthopedic Surgery
- Knee Arthroscopy
- Meniscal Pathology
Background:
- The meniscal flounce is an anatomical feature of the meniscus.
- Its diagnostic significance in knee arthroscopy is not fully understood.
Purpose of the Study:
- To characterize the incidence and significance of the meniscal flounce.
- To determine the meniscal flounce's utility in diagnosing meniscal tears during knee arthroscopy.
Main Methods:
- Prospective cohort study involving 1088 consecutive knee arthroscopies.
- Correlation analysis between the presence and characteristics of the meniscal flounce and meniscal integrity.
Main Results:
- A 'normal' meniscal flounce strongly correlated with an intact meniscus (p<0.0001).
- For the medial meniscus, a small flounce in zone 3 had 68.5% sensitivity and 92.9% specificity for an intact meniscus.
- Absence or abnormality of the flounce correlated with meniscal pathology (p<0.0001), with absence of a medial flounce having 82.8% sensitivity and 84.9% specificity for a tear.
Conclusions:
- The presence of a normal meniscal flounce is a useful indicator of an intact meniscus, especially when posterior visualization is challenging.
- An abnormal or absent flounce may suggest an occult meniscal tear, prompting further investigation.
- Findings aid arthroscopists in assessing meniscal integrity, particularly in difficult-to-visualize areas.