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Posterior medial meniscus root ligament lesions: MRI classification and associated findings.
- Source :
-
AJR. American journal of roentgenology [AJR Am J Roentgenol] 2014 Dec; Vol. 203 (6), pp. 1286-92. - Publication Year :
- 2014
-
Abstract
- Objective: The purposes of this study were to determine the prevalence of altered MRI appearances of "posterior medial meniscus root ligament (PMMRL)" lesions, introduce a classification of lesion types, and report associated findings.<br />Materials and Methods: We retrospectively reviewed 419 knee MRI studies to identify the presence of PMMRL lesions. Classification was established on the basis of lesions encountered. The medial compartment was assessed for medial meniscal tears in the meniscus proper, medial meniscal extrusion, insertional PMMRL osseous changes, regional synovitis, osteoarthritis, insufficiency fracture, and cruciate ligament abnormality.<br />Results: PMMRL abnormalities occurred in 28.6% (120/419) of the studies: degeneration, 14.3% (60/419) and tear, 14.3% (60/419). Our classification system included degeneration and tearing. Tearing was categorized as partial or complete with delineation of the point of failure as entheseal, midsubstance, or junction to meniscus. Of all tears, 93.3% (56/60) occurred at the meniscal junction. Univariate analysis revealed significant differences between the knees with and without PMMRL lesions in age, medial meniscal tear, medial meniscal extrusion, insertional PMMRL osseous change, regional synovitis, osteoarthritis, insufficiency fracture (p=0.017), and cruciate ligament degeneration (p<0.001).<br />Conclusion: PMMRL lesions are commonly detected in symptomatic patients. We have introduced an MRI classification system. PMMRL lesions are significantly associated with age, medial meniscal tears, medial meniscal extrusion, insertional PMMRL osseous change, regional synovitis, osteoarthritis, insufficiency fracture, and cruciate ligament degeneration.
- Subjects :
- Adolescent
Adult
Aged
Aged, 80 and over
Cartilage Diseases classification
Child
Female
Humans
Knee Injuries classification
Male
Middle Aged
Reproducibility of Results
Sensitivity and Specificity
Young Adult
Cartilage Diseases pathology
Knee Injuries pathology
Ligaments, Articular injuries
Ligaments, Articular pathology
Magnetic Resonance Imaging methods
Menisci, Tibial pathology
Tibial Meniscus Injuries
Subjects
Details
- Language :
- English
- ISSN :
- 1546-3141
- Volume :
- 203
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- AJR. American journal of roentgenology
- Publication Type :
- Academic Journal
- Accession number :
- 25415707
- Full Text :
- https://doi.org/10.2214/AJR.14.12559