Posterior shoulder dislocation

120 views510y Female10/9/2026

Clinical Presentation

Left shoulder pain after pushing a heavy object.

1There is lack of overlap between the glenoid and the humeral head
2The shoulder is rotated such that the humeral head has a 'light bulb' appearance
3Both the lateral and especially the axillary view clearly demonstrate the relationship between the glenoid and the humeral head, and confirm a posterior dislocation
4On both views the acromion (A), clavicle (Cl), coracoid process (Co) and glenoid (G) are identifiable, and the humeral head can be seen lying posterior
5Post reduction film demonstrate the anterior rim of the glenoid and humeral articular surfaces appearing congruent
6Dislocation film demonstrates no congruency between the glenoid articular suface (blue) and that of the humeral head (yellow)
7In addition due to internal rotation the proximal humeral head has a rounded appearance, likened to a light bulb (light green).Post reduction film demonstrate the anterior rim of the glenoid (blue) and humeral (yellow) articular surfaces appearing congruent.