Lateral Meniscus Root Tear and Meniscus Extrusion with Anterior Cruciate Ligament Tear1 Export

@article{citeulike:5757558, abstract = {10.1148/radiol.2393050559 To retrospectively determine the prevalence of posterior lateral meniscus root tears (LMRTs), as depicted on magnetic resonance (MR) images, in patients with an anterior cruciate ligament (ACL) tear and to investigate the association of LMRTs with lateral meniscus extrusion and other ligament injuries. Institutional review board approval was obtained; informed consent was not required. This study was HIPAA compliant. MR images were obtained in 174 male and 119 female patients (mean age, 37 years; age range, 16–87 years) and retrospectively reviewed for LMRT, medial meniscus root tear (MMRT), nonroot meniscus tear, meniscus extrusion, and presence of meniscofemoral ligaments (MFLs). The χ and unpaired Student tests were performed. In 33 patients, 34 meniscus root tears were identified. An LMRT was present in 26 (9.8\%) of 264 patients, and an MMRT was present in eight (3.0\%) ( = .008). Lateral meniscus extrusion was present in six (23\%) of 26 LMRTs and five (2.2\%) of 231 patients with normal meniscus roots ( < .001). Complex or deep radial tears were found in three of five cases of lateral meniscus extrusion and normal root. The MFL was not observed in five (19\%) of 26 studies of an LMRT. Among these 26 studies of an LMRT, lateral meniscus extrusion was identified in three (14\%) of 21 cases in which the MFL was intact and in three (60\%) of five cases in which the MFL was not identified ( < .03). Prevalence of an extruded meniscus was seven (88\%) of eight for an MMRT and six (23\%) of 26 for an LMRT ( = .001). Prevalence of LMRTs is greater than that of MMRTs in patients with an ACL tear. LMRTs and complex and radial tears are associated with lateral meniscus extrusion; an absent MFL is more prevalent in patients with LMRTs and when the meniscus is extruded. {\copyright} RSNA, 2006}, author = {Brody, Jeffrey M. and Lin, Hank M. and Hulstyn, Michael J. and Tung, Glenn A.}, citeulike-article-id = {5757558}, citeulike-linkout-0 = {http://dx.doi.org/10.1148/radiol.2393050559}, citeulike-linkout-1 = {http://radiology.rsnajnls.org/content/239/3/805.abstract}, citeulike-linkout-2 = {http://radiology.rsnajnls.org/content/239/3/805.full.pdf}, citeulike-linkout-3 = {http://view.ncbi.nlm.nih.gov/pubmed/16714462}, citeulike-linkout-4 = {http://www.hubmed.org/display.cgi?uids=16714462}, doi = {10.1148/radiol.2393050559}, journal = {Radiology}, month = {June}, number = {3}, pages = {805--810}, posted-at = {2009-09-09 09:44:41}, priority = {2}, title = {Lateral Meniscus Root Tear and Meniscus Extrusion with Anterior Cruciate Ligament Tear1}, url = {http://dx.doi.org/10.1148/radiol.2393050559}, volume = {239}, year = {2006} }

TY - JOUR ID - citeulike:5757558 L3 - citeulike-article-id:5757558 N2 - 10.1148/radiol.2393050559 To retrospectively determine the prevalence of posterior lateral meniscus root tears (LMRTs), as depicted on magnetic resonance (MR) images, in patients with an anterior cruciate ligament (ACL) tear and to investigate the association of LMRTs with lateral meniscus extrusion and other ligament injuries. Institutional review board approval was obtained; informed consent was not required. This study was HIPAA compliant. MR images were obtained in 174 male and 119 female patients (mean age, 37 years; age range, 16–87 years) and retrospectively reviewed for LMRT, medial meniscus root tear (MMRT), nonroot meniscus tear, meniscus extrusion, and presence of meniscofemoral ligaments (MFLs). The χ and unpaired Student tests were performed. In 33 patients, 34 meniscus root tears were identified. An LMRT was present in 26 (9.8%) of 264 patients, and an MMRT was present in eight (3.0%) ( = .008). Lateral meniscus extrusion was present in six (23%) of 26 LMRTs and five (2.2%) of 231 patients with normal meniscus roots ( < .001). Complex or deep radial tears were found in three of five cases of lateral meniscus extrusion and normal root. The MFL was not observed in five (19%) of 26 studies of an LMRT. Among these 26 studies of an LMRT, lateral meniscus extrusion was identified in three (14%) of 21 cases in which the MFL was intact and in three (60%) of five cases in which the MFL was not identified ( < .03). Prevalence of an extruded meniscus was seven (88%) of eight for an MMRT and six (23%) of 26 for an LMRT ( = .001). Prevalence of LMRTs is greater than that of MMRTs in patients with an ACL tear. LMRTs and complex and radial tears are associated with lateral meniscus extrusion; an absent MFL is more prevalent in patients with LMRTs and when the meniscus is extruded. © RSNA, 2006 IS - 3 JF - Radiology EP - 810 TI - Lateral Meniscus Root Tear and Meniscus Extrusion with Anterior Cruciate Ligament Tear1 VL - 239 SP - 805 AU - Brody, Jeffrey AU - Lin, Hank AU - Hulstyn, Michael AU - Tung, Glenn PY - 2006/06// UR - http://dx.doi.org/10.1148/radiol.2393050559 ER -