INTRODUCTION: Meniscal damage is common in knee Osteoarthritis (OA) and predictive of structural progression, suggesting that their disruption plays a role in the development of OA. The bone marrow lesion (BML) is associated with pain and is a strong risk factor for structural progression. These lesions are associated with abnormal loading in a knee joint. Therefore, our hypothesis was that in those with symptomatic knee OA, large BMLs would be associated with ipsi-compartmental meniscal derangement. METHODS: This was a cross-sectional study of a subsample of the Osteoarthritis Initiative where one set of magnetic resonance (MR) images from each participant was scored for tibiofemoral BMLs and meniscal derangement. We performed chi-squared tests comparing the prevalence of large BMLs in those with ipsi-compartmental meniscal derangement and those without. RESULTS: 160 Participants had a mean age of 61 (+/-9.9), mean BMI of 30.3 (+/-4.7) and 50% were female. 79% of medial and 39% of lateral menisci showed MRI (Magnetic Resonance Imaging) derangement. In those with medial meniscal MRI derangement, 44% had large medial BMLs while in those without medial meniscal derangement, 0% had large BMLs. Similar results were seen in the lateral compartment. CONCLUSION: Medial and lateral MRI meniscal derangement are highly prevalent in symptomatic knee OA and BMLs are highly associated with ipsi-compartmental MRI meniscal derangement.
INTRODUCTION:Meniscal damage is common in knee Osteoarthritis (OA) and predictive of structural progression, suggesting that their disruption plays a role in the development of OA. The bone marrow lesion (BML) is associated with pain and is a strong risk factor for structural progression. These lesions are associated with abnormal loading in a knee joint. Therefore, our hypothesis was that in those with symptomatic knee OA, large BMLs would be associated with ipsi-compartmental meniscal derangement. METHODS: This was a cross-sectional study of a subsample of the Osteoarthritis Initiative where one set of magnetic resonance (MR) images from each participant was scored for tibiofemoral BMLs and meniscal derangement. We performed chi-squared tests comparing the prevalence of large BMLs in those with ipsi-compartmental meniscal derangement and those without. RESULTS: 160 Participants had a mean age of 61 (+/-9.9), mean BMI of 30.3 (+/-4.7) and 50% were female. 79% of medial and 39% of lateral menisci showed MRI (Magnetic Resonance Imaging) derangement. In those with medial meniscal MRI derangement, 44% had large medial BMLs while in those without medial meniscal derangement, 0% had large BMLs. Similar results were seen in the lateral compartment. CONCLUSION: Medial and lateral MRI meniscal derangement are highly prevalent in symptomatic knee OA and BMLs are highly associated with ipsi-compartmental MRI meniscal derangement.
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