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http://dx.doi.org/10.3348/kjr.2013.14.6.935

Correlation of Histological Examination of Meniscus with MR Images: Focused on High Signal Intensity of the Meniscus Not Caused by Definite Meniscal Tear and Impact on MR Diagnosis of Tears  

Li, Chun Ai (Department of Radiology, Chonbuk National University Hospital, Chonbuk National University College of Medicine)
Kim, Min Ki (Cham Orthopedic Clinic)
Kim, In Hwan (Department of Radiology, Chonbuk National University Hospital, Chonbuk National University College of Medicine)
Lee, Ju Hong (Department of Orthopedics, Chonbuk National University Hospital, Chonbuk National University College of Medicine)
Jang, Kyu Yun (Department of Pathology, Chonbuk National University Hospital, Chonbuk National University College of Medicine)
Lee, Sang Yong (Department of Radiology, Chonbuk National University Hospital, Chonbuk National University College of Medicine)
Publication Information
Korean Journal of Radiology / v.14, no.6, 2013 , pp. 935-945 More about this Journal
Abstract
Objective: To document the causes of high signal intensity of the meniscus which is not caused by definite meniscal tears on MR imaging, through correlation with histological examination. Materials and Methods: For the correlation between the MR image and histology, we obtained prospectively 31 meniscal specimens from 21 patients. Proton density-weighted turbo spin-echo MR images were used. Minimal tear, thinning of the lamellar layer, degeneration of the central layer, and radial tie fibers were detected upon histological examination, and were correlated with the corresponding MR images. Results: Minimal tear of the lamellar layer was seen in 60 zones out of 100 slides. On MR images, 29 (48.3%) of these 60 zones had high signal intensity. Thinning of the lamellar layer was seen in 24 zones, with 7 (29.2%) having high signal intensity. 57 central zones showed degenerative change in the central layer and high signal intensity on all corresponding MR images. Radial tie fibers in the central layer appeared as high signal intensity areas. Conclusion: Minimal tear and thinning of the lamellar layer, degeneration and radial tie fibers of the central layer of the meniscus cause high signal intensity on MR images.
Keywords
Knee Joint; Knee injuries; Menisci, tibial; MR;
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