title: [Comparison of MRI and arthroscopic images for the diagnosis of knee disorders].
abstract: OBJECTIVE
  The purpose of this study was to compare the diagnostic performance of magnetic resonance imaging with arthroscopy for intra-articular knee conditions.
  
  
  METHODS
  Between January 2000 and February 2007, 93 patients with medial meniscal tear, lateral meniscal tear, anterior cruciate ligament rupture, and articular cartilage pathology were prospectively assessed. After the physical exam, magnetic resonance imaging studies and arthroscopic surgery of the knee were performed. The sensitivity, specificity, positive and negative predictive values and the diagnostic odds ratio were estimated to compare the magnetic resonance imaging diagnoses with the arthroscopic findings.
  
  
  RESULTS
  Fifty-two patients were males and 41 females; mean patient age was 42.6 years (16-68 years). The diagnostic odds ratio was significant for medial meniscal tear, anterior cruciate ligament rupture and the coexistence of both meniscal and ligament lesions.
  
  
  CONCLUSIONS
  The strength of the diagnostic association confirms the usefulness of magnetic resonance imaging for medial meniscal tears, anterior cruciate ligament rupture and the coexistence of both lesions. We do not recommend ordering a routine preoperative magnetic resonance imaging study as a condition for performing knee arthroscopy.
authors.affiliation: Servicio de Ortopedia y Traumatología, Hospital Español de México. drvallesf@yahoo.com.mx
authors.forename: Juan Francisco Javier
authors.initials: JF
authors.lastname: Valles-Figueroa
authors.forename: Mariana
authors.initials: M
authors.lastname: Malacara-Becerra
authors.forename: Patricio
authors.initials: P
authors.lastname: Villegas-Paredes
authors.forename: Enrique
authors.initials: E
authors.lastname: Caleti-Del Mazo
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000070598:Anterior Cruciate Ligament Injuries; D001182:Arthroscopy; D005260:Female; D006801:Humans; D007718:Knee Injuries / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D011446:Prospective Studies; D012421:Rupture; D012680:Sensitivity and Specificity; D000070600:Tibial Meniscus Injuries