Posterior shoulder dislocation with reverse Hill-Sachs and reverse Bankart lesions
Presentation
Motor car accident
Patient Data
Posterior shoulder dislocation with trough line sign and loss of normal half moon overlap sign.
Post relocation
Shoulder is now enlocated.
Compression defect in the anteromedial humeral head (reverse Hill-Sachs lesion) and small chip fracture of the posterior glenoid (reverse Bankart lesion) are the sequelae of prior posterior shoulder dislocation.
Case Discussion
Posterior shoulder dislocation demonstrated on initial plain films (trough line sign and loss of normal half moon overlap sign) .
Post reduction plain films and CT reveal bony compression defect in the anteromedial humeral head (reverse Hill-Sachs lesion) and small chip fracture of the posterior glenoid (reverse Bankart lesion) which are common injuries associated with posterior shoulder dislocation.