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International Journal of Recent Trends in Science and Technology, ISSN 2277-2812 E-ISSN: 2249-8109
Volume 9, Issue 2, December 2013 pp 159-163
Comparison of MRI Findings with Arthroscopy Findings in Internal Derangement of Knee
Ketan Gupta1, P. N. Kulkarni2, Nitin Patil3
1Resident, 2Professor and Head, 3Assistant Professor, Department of Orthopaedics
Krishna Institute of Medical Sciences Deemed University, Karad, Maharashtra, INDIA.
Academic Editor : Dr. Aher K.R.
Aim: Comparison of MRI findings with arthroscopy findings in internal derangement of knee. Materials and Methods: This study had prospective observational design. Thirty patients who were diagnosed clinically in outpatient department were first evaluated by MRI to have internal derangement of knee and underwent arthroscopic intervention, were included in the study. Accuracy of MRI diagnosis as had been made earlier was compared with arthroscopic examination findings. Results: Sensitivity of anterior cruciate ligament (ACL) 100% and medial meniscus (MM) 100% was found to be excellent, of lateral meniscus (LM) 75% was good and of posterior cruciate ligament (PCL) 57% was average respectively. Specificity of PCL 60% was average but of ACL57% MM 20% and LM 31% was poor respectively .Accuracy of ACL 63% and PCL 60% was average and of MM 46% and LM 53% was poor respectively. Positive predictive value and negative predictive value of ACL was 60% and 100%, Of PCL was 30% and 82%, Of MM was 38% and 100% and of LM is 28% and 77% respectively. Conclusion: Routine use of MRI scan to confirm diagnosis is not indicated, as the positive predictive value of the scan is low for all lesions. In the presence of positive clinical signs, proceeding to arthroscopy is recommended. The negative predictive value of a scan was found to be high for all structures of the knee joint and hence a ‘normal’ scan can be used to exclude pathology. Reporting of MRI is dependent on the technician and the Radiologist. It has a long learning curve.