|Patient: 40 year old male|
|History: Status post "shoulder dislocation" persisting pain and instability.|
|Findings: Internal rotation plain film (fig 1) shows smooth, shallow depression and sclerosis of the lateral aspect of humeral head. External rotation and "baby-arm" plain films show ill-defined subarticular sclerosis, not accounted for by superimposed anatomy. MR imaging clearly shows compression injury to the postero-lateral aspect of the humerus (low T1/hi fat-sat, T2 and PD signal changes).|
|Diagnosis: Hill-Sachs deformity of the posterolateral humeral head|
|Discussion: Most (over 95%) glenohumeral dislocation results in anterio-medial humeral displacement. Dislocation is often initiated from an abducted-externally rotated position, resulting in significant impact of the postero-lateral aspect of the humeral head against the glenoid. Compression injury to the humeral head has been referred to as the Hill-Sachs deformity or "hatchet" deformity. Associated injury to the cartilagenous and/or osseous portions of the glenoid are also common, as in this patient who also had a labral injury.|
| References: |
1. Greenspan: Orthopedic Imaging- a practical approach 4th ed.
| Comments: |
No comments posted.
| Additional Details:|
Case Number: 2833802Last Updated: 08-16-2006 The reader is fully responsible for confirming the accuracy of this content.
The reader is fully responsible for confirming the accuracy of this content.