Posterolateral rotatory instability is a recently described condition resulting from insufficiency of the lateral ligamentous and muscular support of the elbow.1,2 Lateral joint laxity allows the proximal forearm (i.e., ulna and radius) to subluxate away from the humeral trochlea when loaded in supination. Unlike medial collateral instability that manifests as medial elbow pain with laxity to valgus stress, posterolateral instability is rarer and is not associated with a specific activity, such as overhead throwing. It often presents with subtle findings on history and examination, and thus the diagnosis requires a high index of suspicion. In this chapter, we review the pertinent anatomy, pathophysiology, and surgical treatment of pos-terolateral rotatory instability of the elbow.
Was this article helpful?
Everything you wanted to know about. How To Cure Tennis Elbow. Are you an athlete who suffers from tennis elbow? Contrary to popular opinion, most people who suffer from tennis elbow do not even play tennis. They get this condition, which is a torn tendon in the elbow, from the strain of using the same motions with the arm, repeatedly. If you have tennis elbow, you understand how the pain can disrupt your day.