| This article relies largely or entirely on a single source .(August 2025) | 
| ALPSA lesion | |
|---|---|
|   | |
| PD-weighted MRI with fat saturation of the shoulder showing an ALPSA lesion | 
An ALPSA (anterior labral periosteal sleeve avulsion) lesion is an injury at the front of the shoulder associated with shoulder dislocation. [1]