Posterolateral dislocation and incarceration of the long head of the biceps tendon: a rare cause of irreducible anterior glenohumeral joint dislocation—a case report and brief review of the literature

Failure of closed reduction of anterior glenohumeral joint dislocation is infrequent. It can be secondary to osseous (e.g., fracture fragments or Hill-Sachs lesion) or soft tissue (e.g., labrum or rotator cuff tendon) impediments. Herein, we present a case of a prolonged irreducible glenohumeral joint secondary to a posterolaterally dislocated and incarcerated long head of the biceps tendon after an episode of anterior instability, highlight the utility of MR imaging for guiding management, and review the literature of this sporadic diagnosis.