title: Lisfranc fracture-dislocation in patients with multiple trauma: diagnosis with multidetector computed tomography.
abstract: BACKGROUND
  We assessed acute phase multidetector computed tomography (MDCT) findings of Lisfranc fracture-dislocations in patients with multiple trauma referred to a Level I trauma center over a 29-month period.
  
  
  METHODS
  Two hundred and eighty two patients (208 male and 74 female) between the ages of 13 and 89 (mean 42) years had, at the request of emergency room physicians, MDCT of the foot and ankle after acute injury.
  
  
  RESULTS
  A total of 21 Lisfranc fracture-dislocations were found in 19 (7%) patients. Two main injury mechanisms were established: falling from high places in 10 injuries (48%) and traffic accidents in five (24%). Primary radiographs were available in 17 (81%) feet, and four (24%) had false negative radiographic results when compared to MDCT. In all Lisfranc fracture-dislocations MDCT showed the joint anatomy and the extent of dislocation better than primary radiographs, and in six (46%) of 13 true positive primary radiographs, MDCT revealed additional occult fractures in the Lisfranc joint. Multidetector CT revealed additional occult fractures in other parts of the foot and ankle in six (35%) of 17 feet.
  
  
  CONCLUSIONS
  Standard radiography remains a primary diagnostic modality in acute foot and ankle trauma. Multidetector CT with high-quality multiplanar reconstruction (MPR) is recommended as a complementary examination in high-energy injury in patients with multiple trauma or in patients in whom radiographic images are equivocal. This may reveal Lisfranc fracture-dislocations, show the extent of the fracture-dislocation, and reveal occult fractures in other parts of the foot and ankle.
authors.affiliation: Department of Radiology, Helsinki University Central Hospital, Töölö Trauma Center, Helskini, Finland FIN-00029.
authors.forename: Ville
authors.initials: V
authors.lastname: Haapamaki
authors.forename: Martti
authors.initials: M
authors.lastname: Kiuru
authors.forename: Seppo
authors.initials: S
authors.lastname: Koskinen
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005188:False Negative Reactions; D005260:Female; D033023:Foot Joints / Q000293:injuries*; D050723:Fractures, Bone / Q000000981:diagnostic imaging*; D006801:Humans; D004204:Joint Dislocations / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D009104:Multiple Trauma / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed / Q000379:methods