title: Association of the type of trauma, occurrence of bone bruise, fracture and joint effusion with the injury to the menisci and ligaments in MRI of knee trauma.
abstract: BACKGROUND
  magnetic resonance imaging (MRI) as a noninvasive diagnostic tool may help clinicians in the evaluation of injuries to menisci and ligaments.
  
  
  OBJECTIVE
  this study assessed the associations between type of trauma to knee joint, bone bruise, fracture and pathological joint effusion with injuries to menisci and ligaments of knee joint.
  
  
  METHODS
  we reviewed knee joint MRI of 175 patients aged less than 45 years old who were referred to MRI center of our University.
  
  
  RESULTS
  statistical analysis showed that tearing of medial meniscus (MM) is significantly more common in sport related trauma (p= 0.045) but tearing of medial collateral ligament (MCL) is significantly more common in non-sport related trauma (p= 0.005). Existence of bone bruise in knee MRI is negatively associated with tearing of medial meniscus (MM) (p=0.004) and positively associated with tearing of anterior cruciate ligament (ACL) (p=0.00047) and medial collateral ligament (MCL) (p = 0.0001). Existence of fracture is associated with decreased risk of the tearing of ACL and MM (p=0.04, p=0.001 respectively). Pathologic joint effusion is significantly more common in ACL and MCL tearing (p=0.0001, p=0.004 respectively).
  
  
  CONCLUSIONS
  as diagnostic clues, bone bruise, fracture and joint effusion may help radiologists for better assessment of injury to menisci and ligaments in MRI of patients with knee trauma.
authors.affiliation: Department of Diagnostic and Interventional Radiology, Johann Wolfgang Goethe University Frankfurt, Frankfurt, Germany.
authors.forename: Sina
authors.initials: S
authors.lastname: Pezeshki
authors.affiliation: Department of Diagnostic and Interventional Radiology, Johann Wolfgang Goethe University Frankfurt, Frankfurt, Germany.
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Vogl
authors.affiliation: Department of Community Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.
authors.forename: Mohammad Zakaria
authors.initials: MZ
authors.lastname: Pezeshki
authors.affiliation: Department of Radiology, Tabriz University of Medical Sciences, Tabriz, Iran.
authors.forename: Mohammad Hossein
authors.initials: MH
authors.lastname: Daghighi
authors.affiliation: Department of Radiology, Tabriz University of Medical Sciences, Tabriz, Iran.
authors.forename: Masoud
authors.initials: M
authors.lastname: Pourisa
keywords: knee joint; ligaments; magnetic resonance imaging