IMAGES IN EMERGENCY MEDICINE
Posterior shoulder dislocation with reverse Hill–Sachs deformity
1 Department of Radiology, Hospital Universitario La Fe, Valencia, Spain
2 Department of Orthopaedics and Traumatology, Hospital Arnau de Vilanova, Valencia, Spain
Correspondence to:
Dr M Ballesta Moratalla, Department of Radiology, La Fe Hospital, Avenida Campanar, 21, Valencia 46009, Spain; monica_ballesta@hotmail.com
Accepted 22 August 2008
| The first 150 words of the full text of this article appear below. |
Shoulder dislocation is the most common dislocation presenting to the emergency department, anterior dislocation being more common. Posterior shoulder dislocation is uncommon, and most frequently occurs following seizures or trauma and has a tendency to be missed. Reverse Hill–Sachs lesion is visualised as any loss of normal convexity in the anteromedial aspect of the humeral head. Late diagnosis is a poor prognostic factor.
A 21-year-old athletic man came off a mountain bike, landing on his outstretched left hand. No deformity was documented. There was severe pain in the proximal humerus. Radiographs and computed tomography were performed, showing the presence of a posterior shoulder dislocation and a reverse Hill–Sachs lesion. The patient was referred to orthopaedics for treatment. He was subsequently treated by open reduction.
Posterior shoulder dislocation accounts for 1–4% of all shoulder dislocations. Acute traumatic posterior shoulder dislocation most commonly results from axial loading of the adducted internally rotated
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