HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by De Smet, A. A. Articles by Shinki, K. Search for Related Content PubMed PubMed Citation Articles by De Smet, A. A. Articles by Shinki, K. Social Bookmarking                      What's this? Hotlight (NEW!) What's Hotlight?

MR Diagnosis of Posterior Root Tears of the Lateral Meniscus Using Arthroscopy as the Reference Standard

¹ Department of Radiology, University of Wisconsin School of Medicine and Public Health, E3/311, 600 Highland Ave., Madison, WI 53792.
² Department of Orthopedics and Rehabilitation Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI.
³ Department of Statistics, University of Wisconsin School of Medicine and Public Health, Madison, WI.

OBJECTIVE. The purpose of our study was to determine whether tears of the posterior root of the lateral meniscus can be diagnosed using standard MR criteria of a meniscal tear in the presence or absence of an anterior cruciate ligament (ACL) tear.

MATERIALS AND METHODS. From a series of 559 knee MR examinations with arthroscopic correlation, we selected all 16 proven tears isolated to the posterior root of the lateral meniscus for retrospective blinded review, along with 45 cases of arthroscopically intact lateral meniscal posterior roots. The reviewers categorized whether there was a torn, possibly torn, or intact root based on three specific coronal and three specific sagittal image locations.

RESULTS. When all possibly torn roots were considered as torn, the sensitivity and specificity for diagnosis of a root tear were 93% and 89%, respectively. The observers' overall diagnosis of a tear based on all images gave a higher combined sensitivity and specificity than if the diagnosis of a tear had been based on one or any combination of the three coronal and three sagittal locations. Root tears were significantly more common in the presence of an ACL tear (p < 0.0001), but the presence or absence of an ACL tear did not change MR diagnostic accuracy.

CONCLUSION. The standard MR criteria of meniscal distortion and signal to the surface can be used to diagnose lateral meniscal root tears. The presence or absence of an ACL tear did not change diagnostic accuracy.

Keywords: accuracy • meniscus anatomy • meniscus tear • MRI

CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this?