Presentation
Pain and limitation of left shoulder movement.
Patient Data
There is the “lightbulb sign” in fact the head of the humerus is in the same axis as the shaft producing a lightbulb shape. Is associated with the “trough sign”, a vertical line made by the impression fracture of the anterior humeral head.
Note the associated “trough sign”, a vertical line made by the impression fracture of the anterior humeral head.
Humeral head posterior dislocation with a depressed impaction deformity medial to the biceps groove with the engaging of the humeral head on the posterior glenoid, interlocked at reverse Hill-Sachs deformity.
Case Discussion
Lesions commonly associated with traumatic posterior dislocation are the reverse Hill-Sachs lesion, a posterior labral detachment, glenohumeral ligament lesions, rotator cuff tears or posterior bony fractures.