title: Ultrasonographic appearance of supinator syndrome.
abstract: OBJECTIVE
  To describe ultrasonographic findings in 4 patients with supinator syndrome (i.e., deep branch of the radial nerve).
  
  
  METHODS
  Four patients with weakness and pain in their forearm underwent ultrasonographic examination with subsequent electroneurographic testing and surgical nerve inspection. Normal measurements of the deep branch of the radial nerve in 10 healthy volunteers served as comparison for measurements in the patients.
  
  
  RESULTS
  An enlarged deep branch of the radial nerve was found in all 4 patients at the affected side. Electroneurographic testing and surgical inspection confirmed the ultrasonographic findings. The mean transverse diameter was 4.2 mm (range, 3.8-4.5 mm), and the anteroposterior diameter was 3.3 mm (range, 2.5-3.8 mm). In volunteers, the mean transverse diameter was 2.13 mm (range, 1.7-2.6 mm), and the mean anteroposterior diameter was 1.3 mm (range, 1.0-1.5 mm).
  
  
  CONCLUSIONS
  The deep branch of the radial nerve appears enlarged in patients with supinator syndrome.
authors.affiliation: Department of Radiology, University Hospital Innsbruck, Austria.
authors.forename: Gerd
authors.initials: G
authors.lastname: Bodner
authors.forename: Christoph
authors.initials: C
authors.lastname: Harpf
authors.forename: Romed
authors.initials: R
authors.lastname: Meirer
authors.forename: Alexander
authors.initials: A
authors.lastname: Gardetto
authors.forename: Peter
authors.initials: P
authors.lastname: Kovacs
authors.forename: Hannes
authors.initials: H
authors.lastname: Gruber
mesh_terms: D000328:Adult; D000368:Aged; D004568:Electrodiagnosis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009408:Nerve Compression Syndromes / Q000000981:diagnostic imaging*; D020425:Radial Neuropathy / Q000000981:diagnostic imaging*; D014463:Ultrasonography