Classification of Bankart and Bankart variant lesions. a Bankart lesion, b bony Bankart lesion, c Perthes lesion, d ALPSA (anterior labro-ligamentous periosteal sleeve avulsion) lesion, e GLAD (glenolabral articular disruption) lesion, f HAGL (humeral avulsion of glenohumeral ligaments) lesion. (LLC anteroinferior labro-ligamentous complex, P scapular periosteum, HH humeral head, AC articular cartilage of glenoid, IGHL inferior glenohumeral ligament)