title: The role of ultrasonography and MRI in patients with non-traumatic nerve fascicle torsion of the upper extremity.
abstract: OBJECTIVE
  To evaluate the role of ultrasonography and magnetic resonance imaging (MRI) in the diagnosis of non-traumatic nerve fascicle torsion of the upper extremity.
  
  
  METHODS
  Eleven patients (unilateral upper extremity) who underwent surgical treatment for nerve fascicle torsion were included in the study. Ultrasonography and MRI showed the detailed anatomy of the region well enough to reveal nerve fascicle torsion. The characterization and classification (single-segmental or multi-segmental) based on ultrasonography and diffusion-weighted (DW) MRI findings were recorded.
  
  
  RESULTS
  The hourglass-shaped appearance was a characteristic feature of nerve fascicle torsion, Characterization and classification based on ultrasonography and MRI findings were consistent with intraoperative findings.
  
  
  CONCLUSIONS
  Ultrasonography and MRI may be valuable in the diagnosis of non-traumatic nerve fascicle torsion of the upper extremity.
authors.affiliation: Shandong Medical Imaging Research Institute, Shandong Provincial Key Laboratory of Diagnosis and Treatment of Cardio-cerebral Vascular Diseases, Shandong University, Jinan, Shandong, China.
authors.forename: H T
authors.initials: HT
authors.lastname: Qi
authors.forename: X M
authors.initials: XM
authors.lastname: Wang
authors.forename: S Y
authors.initials: SY
authors.lastname: Li
authors.forename: G B
authors.initials: GB
authors.lastname: Wang
authors.forename: D H
authors.initials: DH
authors.lastname: Wang
authors.forename: Z T
authors.initials: ZT
authors.lastname: Wang
authors.forename: X D
authors.initials: XD
authors.lastname: Zhang
authors.forename: J B
authors.initials: JB
authors.lastname: Teng
mesh_terms: D000293:Adolescent; D000328:Adult; D042241:Early Diagnosis; D006801:Humans; D010523:Peripheral Nervous System Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D011300:Preoperative Care / Q000379:methods; D020425:Radial Neuropathy / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D014102:Torsion Abnormality / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D020424:Ulnar Neuropathies / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D014463:Ultrasonography; D034941:Upper Extremity / Q000294:innervation; D055815:Young Adult