Posterolateral Rotatory Instability of the Elbow: Diagnosis and Management

Posterolateral rotatory instability has become a more commonly diagnosed entity since its initial description by O’Driscoll in 1991. Examination of the elbow in the prone position and the arthroscopic drive through sign facilitates the diagnosis. Ligament plication with or without repair to the humerus or graft substitutions provides satisfactory results in a majority of cases.