Figure 2.

Hematoxylin-eosin staining (a) and indirect immunofluorescence for collagen types I (b) and II (c) in comparable areas. The acromial portion of the bursa is in the upper left-hand corner and the segment close to the rotator cuff is in the bottom right-hand corner, with some fat tissue in between. The asterisk (*) marks dense connective tissue typical of the transition zone between bursa and tendon tissue.