The Role of MRI in the Diagnosis of Intra Articular Knee Derangement: a Prospective Study
Background: MRI has several advantages compared with other modalities in evaluating internal derangement of the knee & it has practically replaced conventional arthrography in the evaluation of menisci & cruciate ligaments as it is non invasive, painless and give excellent soft tissue contrast.
Objective: To assess the role of MRI in internal derangement of the knee.
Methods: Thirty patients with suspected internal derangement of the knee were subjected to a dedicated MR knee study and correlated knee arthroscopy and surgery. MRI of the knee was performed in closed magnet (1.5T, Seimens). Arthroscopy was done within two months of MR examination and was considered gold standard for the internal derangement of the knee.
Results: The sensitivity, specificity, diagnostic accuracy of MRI were 94.1%, 84.6% and 90% respectively for medial meniscal tear; 71.4%, 95.6% and 90% respectively for lateral meniscal tear and 85.7%, 91.3% and 90% respectively for anterior cruciate ligament tear.
Conclusion: MRI represents the optimal imaging tool in the evaluation of internal knee derangement as it showed high sensitivity, specificity, diagnostic accuracy for meniscal and cruciate ligament injury, in addition to associated derangement like articular cartilage damage and synovial effusion.
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