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Knee Arthroscopy: The “Crevice Sign,” A New Pathognomonic Sign For Unstable Posterior Medial Meniscal Tear In Anterior Cruciate Ligament Deficient Knees

2023 Congress Paper Abstracts
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Knee Arthroscopy: The “Crevice Sign,” A New Pathognomonic Sign For Unstable Posterior Medial Meniscal Tear In Anterior Cruciate Ligament Deficient Knees

J Donald Hansom, FRCS, MD, MBChB, BSc (Hons), UNITED KINGDOM Jérôme Murgier, MD, FRANCE Mark G. Clatworthy, FRACS, NEW ZEALAND

Mercy Ascot Hosptial, Auckland, NEW ZEALAND


2023 Congress   ePoster Presentation   2023 Congress   Not yet rated

 

Diagnosis / Condition

Treatment / Technique

Anatomic Location

Anatomic Structure

Cartilage

Ligaments

ACL


Summary: We describe a novel diagnostic sign, indicative of an unstable medial mensical tear that is visualised during arthroscopy in Anterior Cruciate Ligament deficient knees.


There has been increased emphasis on medial meniscus repair in the anterior cruciate ligament reconstructed
knee, as this improves stability. We describe an arthroscopic sign of an unstable medial meniscal tear that is diagnostic. The “crevice sign” is a longitudinal fissure located on the distal medial femoral condyle. In the anterior cruciate ligament deficient knee, there is increased strain on the medial meniscus. A posterior longitudinal medial meniscal tear can occur at the time of the index injury or with subsequent instability events. During this injury, the knee pivots and the anterior edge of the unstable medial meniscus digs into the articular cartilage of the medial femoral condyle, resulting in a longitudinal split of the distal femoral condyle articular cartilage. If this sign is observed during arthroscopy, it is recommended that surgeons thoroughly probe the medial meniscus to ensure no pathology is missed.


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