title: [Ultrasound detection of dislocation of the ulnar nerve from the sulcus of the elbow joint].
abstract: BACKGROUND
  Chronic ulnar nerve subluxation out of the sulcus in the elbow region may be a rare reason for undefined chronic disorders in the medial elbow aspect.
  
  
  METHODS
  We report two cases: A 38 years old male patient reports recurrent painful disorders including paresthesia of the 4th and 5th fingers. A 12 years old boy shows a palpable band in the medial elbow region without pain.
  
  
  RESULTS
  In both patients, the ulnar nerve was completely identified, both in transverse and longitudinal planes. Sonomorphology and echogeneity were the same as in the controlateral limb. Ulnar nerve subluxation could be diagnosed in elbow joint flexion, in both cases.
  
  
  CONCLUSIONS
  Dynamic ultrasonographic examination is able to diagnose and document ulnar nerve subluxation and determine further (surgical) treatment.
authors.affiliation: Universitätsklinik für Unfallchirurgie, Graz, Germany.
authors.forename: W
authors.initials: W
authors.lastname: Grechenig
authors.forename: H
authors.initials: H
authors.lastname: Clement
authors.forename: J
authors.initials: J
authors.lastname: Mayr
authors.forename: G
authors.initials: G
authors.lastname: Peicha
mesh_terms: D000328:Adult; D002648:Child; D002908:Chronic Disease; D020430:Cubital Tunnel Syndrome / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D009460:Neurologic Examination; D010292:Paresthesia / Q000000981:diagnostic imaging*; D012680:Sensitivity and Specificity; D014459:Ulnar Nerve / Q000000981:diagnostic imaging / Q000293:injuries*; D014463:Ultrasonography