Fig. 2From: Pre-operative factors correlated with arthroscopic reparability of large-to-massive rotator cuff tearsThe superior migration of humeral head was defined with two methods of measurement. Acromioclavicular interval (arrow) was measured between the inferior border of acromion and the superior aspect of humeral head. Inferior glenohumeal distance (arrow head) was measured between the inferior glenoid margin and the inferior humeral head margin at just the intersection of humeral head and the humeral neckBack to article page