Complete tear of the lateral meniscus posterior root is associated with meniscal extrusion in anterior cruciate ligament deficient knees

ABSTRACT This study aimed to evaluate the relationship between preoperative lateral meniscal extrusion (LME) and arthroscopic findings of lateral meniscus posterior root tear (LMPRT) in knees with anterior cruciate ligament (ACL) tear. Thirty‐five knees that had LMPRTs with concomitant ACL tears on...

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Bibliographic Details
Published in:Journal of orthopaedic research 2018-07, Vol.36 (7), p.1894-1900
Main Authors: Kamatsuki, Yusuke, Furumatsu, Takayuki, Fujii, Masataka, Kodama, Yuya, Miyazawa, Shinichi, Hino, Tomohito, Ozaki, Toshifumi
Format: Article
Language:English
Subjects:
Adolescent
Adult
anterior cruciate ligament
Anterior Cruciate Ligament - surgery
Anterior Cruciate Ligament Injuries - complications
Anterior Cruciate Ligament Reconstruction
Arthroscopy
Female
Humans
Joint Instability - pathology
lateral meniscus
magnetic resonance imaging
Male
meniscal extrusion
Menisci, Tibial - pathology
Menisci, Tibial - physiopathology
Middle Aged
Observer Variation
posterior root tear
Reproducibility of Results
Retrospective Studies
ROC Curve
Sensitivity and Specificity
Tibial Meniscus Injuries - complications
Young Adult
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Summary:ABSTRACT This study aimed to evaluate the relationship between preoperative lateral meniscal extrusion (LME) and arthroscopic findings of lateral meniscus posterior root tear (LMPRT) in knees with anterior cruciate ligament (ACL) tear. Thirty‐five knees that had LMPRTs with concomitant ACL tears on arthroscopy were evaluated. Patients were divided into two groups, partial and complete root tears, via arthroscopic findings at the time of ACL reconstruction. For comparison, we added two groups, using the same database; 20 normal knees (normal group) and 20 ACL‐injured knees without LM injury (intact LM group). We retrospectively measured preoperative LMEs using magnetic resonance imaging (MRI). Twenty‐three knees had partial LMPRTs. Complete LMPRTs were observed in 12 knees. The average LME was −0.1 ± 0.4 mm in the normal group, 0.2 ± 0.5 mm in the intact LM group, 0.4 ± 0.8 mm in the partial LMPRT group, and 2.0 ± 0.6 mm in the complete LMPRT group. A significant difference in preoperative LMEs was observed between the complete LMPRT group and the other groups (p 
ISSN:0736-0266
1554-527X
DOI:10.1002/jor.23861