Fig. 6

Histological and immunohistochemical characterization of paraffin embedded tissue sections from bursa subacromialis. Tissue sections were histologically analyzed and stained for general evaluation with a hematoxylin and eosin stain (H&E), stained positive for collagens using b Masson-Goldner trichrome (MG) staining, c Van Gieson (VG) staining or d Azan staining. e Detection of mucines was performed using Periodic-Acid-Schiff (PAS) staining. Immunohistochemical detection of surface antigens was negative for incubation with f mouse serum instead of the primary antibody serving as a negative control, but clearly positive for g CD44, h CD90, i CD105 and j Stro-1. Left scale bar = 200 μm; right scale bar = 100 μm. Representative images of six different donors are shown