Co-relation between magnetic resonance imaging and arthroscopy findings in diagnosis of meniscus injuries based on location of the meniscus tear and radial position

Background: The objective of our study was to find the sensitivity, specificity of magnetic resonance imaging (MRI) in diagnosing meniscus tears based on its location medial or lateral and radial position namely; anterior 1/3rd, middle 1/3rd, posterior 1/3rd location of the meniscus.Methods: All patients who have undergone arthroscopic surgeries for knee from January 2017 to July 2021 at our institute were retrospectively analyzed through hospital records comparing the MRI findings with the arthroscopy findings, taken as gold standard. Of the 68 patients found from the hospital records 14 patients were excluded as they didn’t qualify as per the inclusion criteria.Results: The sensitivity and sensitivity of MRI in diagnosis of medial meniscus tear was 100% and 50% respectively. The positive predictive value and negative predictive value for medial meniscus was 68%and 100% respectively whereas for lateral meniscus it was 50%and 100%respectively. Based on the radial location of the tear for the medial meniscus the sensitivity of MRI was maximum for middle and posterior 1/3rd medial meniscus tear (100%). For the lateral meniscus the maximum sensitivity was for the middle1/3rd (100%) but specificity and positive predictive value was maximum (100%) for the anterior 1/3rd and posterior 1/3rd tear.Conclusions: The MRI had similar sensitivity and specificity for both the medial and lateral meniscus diagnosis although specificity was low indicating many false positive results from MRI. Middle 1/3rd medial and lateral meniscus tears had poor predictive value.

[1]  B. Graf,et al.  MR imaging-based diagnosis and classification of meniscal tears. , 2014, Radiographics : a review publication of the Radiological Society of North America, Inc.

[2]  M G Myriam Hunink,et al.  MR imaging of the menisci and cruciate ligaments: a systematic review. , 2003, Radiology.

[3]  Wolf Petersen,et al.  Collagenous fibril texture of the human knee joint menisci , 1998, Anatomy and Embryology.

[4]  B. Graf,et al.  Meniscal tears missed on MR imaging: relationship to meniscal tear patterns and anterior cruciate ligament tears. , 1994, AJR. American journal of roentgenology.

[5]  J. S. Keene,et al.  MR diagnosis of meniscal tears of the knee: importance of high signal in the meniscus that extends to the surface. , 1993, AJR. American journal of roentgenology.

[6]  R J Johnson,et al.  Anatomy and biomechanics of the menisci. , 1990, Clinics in sports medicine.

[7]  S. F. Quinn,et al.  Meniscal tears: pathologic correlation with MR imaging. , 1988, Radiology.

[8]  J. Crues,et al.  Meniscal tears of the knee: accuracy of MR imaging. , 1987, Radiology.

[9]  L. Bassett,et al.  Meniscal injuries: detection using MR imaging. , 1986, Radiology.

[10]  A. M. Ahmed,et al.  In-vitro measurement of static pressure distribution in synovial joints--Part I: Tibial surface of the knee. , 1983, Journal of biomechanical engineering.

[11]  E. Radin,et al.  Meniscal function and the importance of meniscal regeneration in preventing late medical compartment osteoarthrosis. , 1982, Clinical orthopaedics and related research.

[12]  T. Fukubayashi,et al.  The contact area and pressure distribution pattern of the knee. A study of normal and osteoarthrotic knee joints. , 1980, Acta orthopaedica Scandinavica.

[13]  D G Wilder,et al.  Mechanical changes in the knee after meniscectomy. , 1976, The Journal of bone and joint surgery. American volume.

[14]  T. Fairbank.  Knee joint changes after meniscectomy. , 1948, The Journal of bone and joint surgery. British volume.

[15]  D. Nikolić.  Lateral meniscal tears and their evolution in acute injuries of the anterior cruciate ligament of the knee Arthroscopic analysis , 1998, Knee Surgery, Sports Traumatology, Arthroscopy.