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Anterior labroligamentous periosteal sleeve avulsion (ALPSA)

Case contributed by Roberto Schubert
Diagnosis certain

Presentation

MRI performed after reduced anterior shoulder dislocation.

Patient Data

Age: 25 years
Gender: Male

A detachment of the anteroinferior labrum from the glenoid and scapular periosteum is lifted.

Case Discussion

The labral-ligamentous complex is displaced medially, rolling up itself underneath intact periosteum. The labrum is still attached to the capsule, but avulsed from the glenoid.

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