Medial meniscal ossicles: Associated knee MRI findings in a multicenter case-control study |
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Authors: | Amandine Caudal Daphné Guenoun Guillaume Lefebvre Jean-François Nisolle Gabriel Gorcos Valérie Vuillemin Bruno Vande Berg |
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Affiliation: | 1. Department of Radiology, CHU Pasteur 2, 06001 Nice cedex 1, France;2. Department of Radiology, Institute for Locomotion, Sainte-Marguerite Hospital, AP–HM, 13009 Marseille, France;3. CNRS, ISM, Institute Movement Sci, Aix-Marseille Université, 13000 Marseille, France;4. Department of Radiology & Musculoskeletal Imaging, Centre de consultation et d’imagerie de l’appareil locomoteur, CHU de Lille, 59037 Lille cedex, France;5. Department of Radiology, CHU UCL Namur IREC, 5530 Yvoir, Belgium;6. Centre d’Imagerie Médicale Léonard-de-Vinci, 75116 Paris, France;7. Department of Radiology, Institut de Recherche expérimentale et Clinique (IREC), Cliniques Universitaires Saint-Luc, Université Catholique de Louvain (UCLouvain), 1200 Brussels, Belgium |
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Abstract: | PurposeThe purpose of this study was to assess and compare the prevalence of meniscal, ligament and cartilage lesions on knee MRI in a series of age- and sex-matched patients with and without medial meniscal ossicle.Materials and methodsForty-two knee MRI examinations obtained in 42 patients (36 men, 6 women; mean age, 42.5 ± 22.2 [SD] years; range: 19–65 years) on which a medial meniscal ossicle was present were compared to 42 knee MRI examinations obtained in 42 age- and sex-matched patients (36 men, 6 women; mean age, 41.8 ± 20.6 [SD] years; range: 19–65 years) on which no medial meniscal ossicles were present. Two radiologists (R1, R2) blinded to the presence of meniscal ossicle by reading only the fat-saturated intermediate-weighted MR images separately assessed the presence of meniscal, ligament and cartilage lesions on these 84 knee MRI examinations. Prevalence of meniscal and ligament lesions and degree of cartilage degradation at MRI were compared between knees with and those without medial meniscal ossicle.ResultsIn knees with medial meniscal ossicle, R1 and R2 detected 33 (79%) and 38 (90%) medial meniscal lesions, respectively that involved the posterior root (n = 25/32 for R1/R2), the posterior horn (n = 19/14 for R1/R2) or the body (n = 8/10 for R1/R2). The prevalence of posterior root tear (60% [25/42]/76% [32/42] for R1/R2) and that of anterior cruciate ligament (ACL) lesions (48% [20/42]/57% [24/42] for R1/R2) as well as the medial cartilage degradation score (3.35 ± 0.87 [SD] for R1 and 3.92 ± 0.78 [SD] for R2) were significantly greater in knees with than in knees without medial meniscal ossicle (root lesions: P < 0.01 for both readers; ACL lesions and medial cartilage score: P < 0.01 for both readers).ConclusionOn MRI examination, knees with a medial meniscal ossicle demonstrate a greater frequency of medial posterior root tear and of ACL lesions and a greater degree of medial femoro-tibial cartilage degradation by comparison with knees without medial ossicle. |
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Keywords: | Knee joint Magnetic resonance imaging (MRI) Menisci, tibial Meniscal ossicle Anterior cruciate ligament ACL" },{" #name" :" keyword" ," $" :{" id" :" kw0035" }," $$" :[{" #name" :" text" ," _" :" Anterior cruciate ligament ETL" },{" #name" :" keyword" ," $" :{" id" :" kw2065" }," $$" :[{" #name" :" text" ," _" :" Echo-train Length FOV" },{" #name" :" keyword" ," $" :{" id" :" kw3065" }," $$" :[{" #name" :" text" ," _" :" Field of View LCL" },{" #name" :" keyword" ," $" :{" id" :" kw0055" }," $$" :[{" #name" :" text" ," _" :" Lateral Collateral ligament MCL" },{" #name" :" keyword" ," $" :{" id" :" kw0065" }," $$" :[{" #name" :" text" ," _" :" Medical Collateral ligament MRI" },{" #name" :" keyword" ," $" :{" id" :" kw0075" }," $$" :[{" #name" :" text" ," _" :" Magnetic Resonance Imaging PCL" },{" #name" :" keyword" ," $" :{" id" :" kw0085" }," $$" :[{" #name" :" text" ," _" :" Posterior Cruciate ligament SE" },{" #name" :" keyword" ," $" :{" id" :" kw0095" }," $$" :[{" #name" :" text" ," _" :" Spin-Echo TR" },{" #name" :" keyword" ," $" :{" id" :" kw0105" }," $$" :[{" #name" :" text" ," _" :" Repetition Time TE" },{" #name" :" keyword" ," $" :{" id" :" kw0115" }," $$" :[{" #name" :" text" ," _" :" Echo-Time |
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