(63) Yiannakoulos reported 12.5% of anterior labroligamentous periosteal sleeve avulsion (ALPSA) lesions in recurrent dislocators compared to 0% in primary dislocators.
(2) Risk factors for failure after arthroscopic Bankart repair include male sex, young age at the time of initial injury, presence of an ALPSA lesion, presence of an off-track Hill-Sachs lesion, glenoid bone loss greater than 20%, duration of time from injury to surgery, and generalized hyperlaxity.
Amongst the anteroinferior labral injuries in the study, classic bankarts was found in 9 patients, perthes lesion in 2 patients and ALPSA
, GLAD and GLOM in one patient each.
lesions are similar to Perthes lesions apart from further stripping of the periosteal sleeve from the glenoid, allowing the labroligamentous complex to fold back medially onto the scapular neck (Figure 9).
(13) This is differentiated from the ALPSA
lesion by the lack of displacement of the avulsed labrum and is best viewed on MRI in the abducted and externally rotated (ABER) position.