- Discussion: 
- arises from disruption of the lateral collateral and annular ligaments;
- associated conditions:
elbow dislocation,
radial head excision,
coronoid fracture;
-
anatomy:
- anatomically lateral collateral ligament consists of a ligamentous expansion proceding down from lateral epicondyle to ulna (major expansion
which inserts into supinator crest of ulna) and also sends expansions down to annular ligament and radius;
- ECU tendon and the supinator tendon (the later merges with the LCL) both resist posterolateral instability;
- greater role with increased flexion
- lateral ulnar collateral ligament deficiency=Posterolateral rotatory instability
- additional deficiency of radial collateral ligament=Dislocation
- Non Operative Treatment:
- forearm should be immobilized in pronation, where as elbow may be allowed free flexion-extension in a hinged brace;
Morrey BH. Anatomy of the Elbow Joint. In: Morrey BH. The elbow and its disorders. 3rd Ed.
Rotatory Instability of the Elbow M.S. Cohen and H. Hastings MD JBJS Vol 79-A, No 2. Feb 1997 225-233.
Posterolateral rotatory instability of the elbow. SW O'Driscoll et al. JBJS. Vol 73-A. 1991. p 440-446.
Ligamentous reconstruction for posterolateral rotatory instability of the elbow. BJ Nestor et al. JBJS Vol 74-A. 1992. p 1235-1241.
Magnetic resonance imaging in diagnosis of chronic posterolateral rotatory instability of the elbow.
Table top relocation test—New clinical test for posterolateral rotatory instability of the elbow.
The in Vivo Isometric Point of the Lateral Ligament of the Elbow
Posterolateral rotatory instability of the elbow
