MR Arthrogram: Avulsed anterosuperior cartilagenous labrum with periosteal stalk still attached to glenoid
A variation of the Bankart lesion, the Perthes lesion occurs when the scapular periosteum remains intact but is stripped medially, and the anterior labrum is avulsed
from the glenoid but remains partially attached to the scapula by the intact periosteum. Sometimes the laburm settles into its normal position but is detached and unstable. This type of Perthes lesion may be difficult to diagnose. This example is displaced and easier to identify.
