Effect of the acromial inferolateral tilt on subacromial impingement syndrome: a retrospective magnetic resonance imaging assessment

Abstract Objective: To evaluate the effect of acromial inferolateral tilt on subacromial impingement syndrome. Materials and Methods: The acromial inferolateral tilt was retrospectively quantified by two researchers on 346 shoulder magnetic resonance images using the glenoacromial (between the inferior proximal acromial surface and the glenoidal face) and acromioclavicular (between the axis of the proximal acromion and distal clavicle) angles. Results: The glenoacromial angle was associated with subacromial impingement syndrome (p