Posterolateral rotatory instability (PLRI) of the elbow was first described in 1991 by O’Driscoll et al. as a condition that is part of a spectrum of instability caused by persistent insufficiency of the lateral collateral ligament (LCL) complex, most notably the lateral ulnar collateral ligament (LUCL).

Posterolateral rotatory instability of the elbow is often caused by a complex injury to the lateral ulnar collateral ligament complex. This often leads to chronic mechanical symptoms of instability and pain.

Apr 7, 2023 · Posterolateral Rotatory Instability (PLRI) is the most common form of elbow instability due to disruption of the lateral collateral ligament.

Jul 21, 2016 · Posterolateral rotatory instability (PLRI) is the most commonly encountered pattern of elbow instability. It is the result of disruption of the lateral collateral ligament complex leading to a posterolateral rotatory subluxation of the ulna and radial head.

Jan 16, 2024 · Posterolateral rotatory elbow instability indicates injury to the stabilizing structures of the posterolateral elbow, particularly the lateral collateral ligament complex. Patients may present with vague lateral elbow pain, popping, snapping and/or clicking.

Posterolateral rotatory instability of the elbow is a sprain (tear) of one of the ligaments on the outer side of the elbow. The lateral ulnar collateral ligament (LUCL) is a structure that helps keep the normal relationship of the humerus (arm bone) and the radial head (one of the forearm bones).

Jul 21, 2016 · Posterolateral rotatory instability (PLRI) occurs when the proximal ulna and radial head subluxate as a unit off the humerus in a rotatory fashion. 1 PLRI may present after trauma, lateral-sided elbow surgery, and severe cases of lateral epicondylitis (typically after corticosteroid injections), or manifest late in patients with cubitus varus ...

Posterolateral rotatory instability is the most common recurrent instability of the elbow; it occurs secondary to a traumatic or iatrogenic injury to the LCL. Symptoms are due to recurrent posterior radial head subluxation, manifesting as lateral elbow pain or mechanical symptoms when a load is applied while the elbow is in flexion and ...