title: Electrodiagnostically confirmed posttraumatic neuropathy and associated clinical exam findings with lisfranc injury.
abstract: BACKGROUND
  Patients with a Lisfranc injury often complain of persistent pain radiating from the Lisfranc joint up or down the first dorsal web space, accompanied by decreased sensation. We hypothesized that these symptoms were related to a posttraumatic neuropathy of the terminal medial branch of deep fibular (peroneal) nerve (MBDFN) and that by recognizing this symptom an earlier diagnosis of Lisfranc injury may be possible.
  
  
  METHODS
  Twelve patients with diagnosis of subtle unilateral Lisfranc injury, confirmed by standing X-ray, CT, or bone scan, were enrolled. Standardized antidromic sensory nerve conduction studies of MBDFN were performed bilaterally within 2 months postinjury and prior to surgical intervention. The contralateral, normal side was used as a control. All patients were tested for decreased 2-point discrimination in the first dorsal web space on both lower extremities.
  
  
  RESULTS
  Sensory nerve action potential of the MBDFN was absent, with decreased 2-point discrimination on the injured side in all patients.
  
  
  CONCLUSIONS
  Lisfranc injuries were associated with a posttraumatic neuropathy of the MBDFN and decreased 2-point discrimination in the first dorsal web space. The finding of altered sensation in the first dorsal web space may help the practitioner to earlier diagnosis of a Lisfranc injury.
  
  
  METHODS
  Level III, case control study.
authors.affiliation: Department of Physical Medicine and Rehabilitation, Wayne State University School of Medicine, Taylor, MI, USA.
authors.forename: Adam Michael
authors.initials: AM
authors.lastname: Pourcho
authors.forename: Yongmin Harry
authors.initials: YH
authors.lastname: Liu
authors.forename: Michael Alexander
authors.initials: MA
authors.lastname: Milshteyn
mesh_terms: D000200:Action Potentials / Q000502:physiology; D000293:Adolescent; D000328:Adult; D016022:Case-Control Studies; D004568:Electrodiagnosis; D005260:Female; D018409:Foot Injuries / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D008297:Male; D008682:Metatarsal Bones / Q000293:injuries*; D059348:Peripheral Nerve Injuries / Q000175:diagnosis* / Q000503:physiopathology
keywords: Lisfranc injury; midfoot disorders; neuropathy; sports; trauma