PMID- 16714462
OWN - NLM
STAT- MEDLINE
DCOM- 20060608
LR  - 20220330
IS  - 0033-8419 (Print)
IS  - 0033-8419 (Linking)
VI  - 239
IP  - 3
DP  - 2006 Jun
TI  - Lateral meniscus root tear and meniscus extrusion with anterior cruciate ligament 
      tear.
PG  - 805-10
AB  - PURPOSE: 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. 
      MATERIALS AND METHODS: 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 chi2 and unpaired Student t tests were performed. RESULTS: 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%) (P=.008). Lateral 
      meniscus extrusion was present in six (23%) of 26 LMRTs and five (2.2%) of 231 
      patients with normal meniscus roots (P<.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 (P<.03). Prevalence of an extruded meniscus was seven 
      (88%) of eight for an MMRT and six (23%) of 26 for an LMRT (P=.001). CONCLUSION: 
      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.
CI  - Copyright (c) RSNA, 2006.
FAU - Brody, Jeffrey M
AU  - Brody JM
AD  - Department of Diagnostic Imaging, Brown Medical School, Rhode Island Hospital, 
      593 Eddy St, Providence, RI 02903, USA. jbrody@lifespan.org
FAU - Lin, Hank M
AU  - Lin HM
FAU - Hulstyn, Michael J
AU  - Hulstyn MJ
FAU - Tung, Glenn A
AU  - Tung GA
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PL  - United States
TA  - Radiology
JT  - Radiology
JID - 0401260
SB  - IM
MH  - Adolescent
MH  - Adult
MH  - Aged
MH  - Aged, 80 and over
MH  - *Anterior Cruciate Ligament Injuries
MH  - Arthroscopy
MH  - Bone Marrow/injuries
MH  - Cohort Studies
MH  - Contusions/diagnosis
MH  - Female
MH  - Humans
MH  - Image Processing, Computer-Assisted/methods
MH  - Knee Injuries/diagnosis
MH  - *Magnetic Resonance Imaging/methods
MH  - Male
MH  - Medial Collateral Ligament, Knee/injuries
MH  - Middle Aged
MH  - Retrospective Studies
MH  - *Tibial Meniscus Injuries
EDAT- 2006/05/23 09:00
MHDA- 2006/06/09 09:00
CRDT- 2006/05/23 09:00
PHST- 2006/05/23 09:00 [pubmed]
PHST- 2006/06/09 09:00 [medline]
PHST- 2006/05/23 09:00 [entrez]
AID - 239/3/805 [pii]
AID - 10.1148/radiol.2393050559 [doi]
PST - ppublish
SO  - Radiology. 2006 Jun;239(3):805-10. doi: 10.1148/radiol.2393050559.