Recurrent low-energy intrathoracic dislocation of the scapula

Dislocation of the scapula is a rare disorder. The nomenclature in the literature can be confusing as a result of nonspecific terms such as locked scapula and dislocated scapula when referring to both intra- and extra-thoracic dislocations. After a thorough review of the literature we further define and classify scapular dislocations to better understand prognosis and patient education. We report a case of a low-energy intrathoracic dislocation of the scapula due to anomalous anatomy. Similar to another reported case in the literature, we have been able to document recurrence of intrathoracic scapular dislocation only in association with persistent chest wall defects following rib resection.