Recurrent Dislocation Shoulder- MRI

This patient has a history of previous dislocations, 17 year old  boy with evidence of altered contour and possible periosteal sleeve avulsion involving the anteroinferior labrum with asssociated localized fluid collection in relation to anterior labrum possible labral tear and associated paralabral cyst. Likely ALPSA lesion: anterior labroligamentous periosteal sleeve avulsion. In the Bankart lesion, the anterior cartilage labrum is detached and torn from the periosteum. In the ALPSA, the labral fragment remains attached to the periosteum of the scapular margin and can be tethered in this abnormal position, increasing the likelihood further medial displacement and of re-dislocation.