2023 ISAKOS Biennial Congress ePoster
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), Fintry, Stirling UNITED KINGDOM
Jérôme Murgier, MD, Biarritz, Europe FRANCE
Mark G. Clatworthy, FRACS, Auckland NEW ZEALAND
Mercy Ascot Hosptial, Auckland, NEW ZEALAND
FDA Status Not Applicable
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.
ePosters will be available shortly before Congress
Abstract
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.