Off-track Hill-Sachs lesion. A, Three-dimensional CT showing glenoid face with bone loss of width d. In this case, the glenoid track is 83% of normal glenoid width minus d. A2-B2 is the long axis of glenoid. B, Relation of glenohumeral joint in abduction and external rotation. Note loss of contact of intact humeral articular surface with glenoid articular surface because of anteroinferior glenoid bone loss. Large Hill-Sachs interval (distance from posterior rotator cuff attachments to medial margin of Hill-Sachs lesion) is wider than glenoid track width of which has been reduced by glenoid bone loss.