Fig. 3

Evaluation of histological score (1: normal/absent, 2: Focal increase, 3: highly altered/extended) in bursae of healthy group 1 (n = 5), group 2 with osteochondral pathology without RC tear (n = 5), group 3 with partial SSP tear (n = 6) and group 4 with full-thickness SSP tear (n = 14). A minimum of 9 to a maximum of 27 points could be reached. a Disarray of tissue. b Neoangiogenesis. c Hypertrophy of synovium. d Number of fibroblasts. e Nerve fibers. f Chondral metaplasia. g Number of immune cells. h Occurrence of villi. i Fatty metaplasia. j Total histological score was analyzed with a 3-point system of 9 parameters reaching a maximum of 27 points, which would indicate a highly altered bursa tissue. Data are presented as individual dot plots with median and interquartile range. Statistics: Dunn’s Multiple Comparison Test; p ≤ 0.05