title: [Research progress of posterolateral rotatory instability of the elbow].
abstract: OBJECTIVE
  To review the progress in pathoanatomy, diagnosis, and treatment of posterolateral rotatory instability (PLRI) of the elbow.
  
  
  METHODS
  Related literature concerning PLRI of the elbow was extensively reviewed, comprehensive analysis was done.
  
  
  RESULTS
  The lateral collateral ligament complex (LCLC), radial head, capitellum, and coronoid process are important constraints to PLRI. Muscle groups that cross the lateral elbow are secondary constraints to PLRI. Clinical examination includes lateral pivot-shift test, lateral pivot-shift apprehension test, chair sign, active floor push-up sign, tabletop relocation test, and posterolateral rotatory drawer test. Radiology, arthroscopy, and ultrasound can help diagnosis of PLRI. Reconstruction of bony fixation or soft tissue fixation can be used for treatment of injured LCLC.
  
  
  CONCLUSIONS
  The primary constraints to PLRI is LCLC. Ultrasound imaging is accurate for identification and measurement of normal LCLC. Therefore, ultrasound may prove valuable in assessment of abnormal lateral ulnar collateral ligaments. Reconstruction of soft tissue fixation, which can avoid iatrogenic fracture, is a selective treatment method.
authors.affiliation: Department of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P R China.
authors.forename: Cong
authors.initials: C
authors.lastname: Xiao
authors.forename: Fuguo
authors.initials: F
authors.lastname: Huang
mesh_terms: D004551:Elbow Joint / Q000503:physiopathology*; D006801:Humans; D007593:Joint Instability / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery; D012399:Rotation