Injuries of Upper Limb
The Hill Sach's lesion is (DNB Dec 2009)
|A||Avulsion of the glenoid labrum.|
|B||Eburnation of the humeral head.|
|C||Fracture of the greater tuberosity.|
|D||Depression in the posterolateral aspect of the head of the humerus.|
Depression in the posterolateral aspect of the head of the humerus
a. The Hill Sach's lesion is a depression in the posterolateral aspect of the head of the humerus due to compression at the time of the first dislocation.
b. In the position of abduction and external rotation this depression gets hitched in the posterior margin of the glenoid further external rotation levers the head out of the glenoid and it is one of the causes of recurrences.