title: Sonographic incidence of ulnar nerve (sub)luxation and its associated clinical and electrodiagnostic characteristics.
abstract: BACKGROUND
  The aim of this study was to assess the presence of (sub)luxation of the ulnar nerve in patients with ulnar neuropathy at the elbow (UNE) compared with healthy controls (HC). We assessed its clinical patterns, electrodiagnostic, and sonographic characteristics.
  
  
  METHODS
  Using high-resolution sonography, we studied the incidence of (sub)luxation in a cohort of 342 patients and 70 HC.
  
  
  RESULTS
  Subluxation occurred in 14% and luxation in 6.7% of the UNE patients versus 5.7% and 5.7%, respectively, in HC (no significant differences). Pain at the elbow occurred more often in patients with (sub)luxation (P = 0.007). Electrodiagnostic and sonographic findings did not differ between patients with or without (sub)luxation.
  
  
  CONCLUSIONS
  The incidence of ulnar nerve (sub)luxation between patients with UNE and HC does not differ. UNE patients with (sub)luxation do not have specific clinical or electrodiagnostic findings, apart from experiencing pain at the elbow more often.
authors.affiliation: Department of Neurology, St. Elisabeth Hospital, PO Box 90151, 5000 LC Tilburg, The Netherlands.
authors.forename: Petronella J
authors.initials: PJ
authors.lastname: Van Den Berg
authors.forename: Sander M
authors.initials: SM
authors.lastname: Pompe
authors.forename: Roy
authors.initials: R
authors.lastname: Beekman
authors.forename: Leo H
authors.initials: LH
authors.lastname: Visser
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D020430:Cubital Tunnel Syndrome / Q000175:diagnosis*; D004568:Electrodiagnosis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009431:Neural Conduction; D011446:Prospective Studies; D014459:Ulnar Nerve / Q000000981:diagnostic imaging* / Q000503:physiopathology; D014463:Ultrasonography; D055815:Young Adult