Fig. 4

Histologic scores and collagen type I content of superficial digital flexor tendons. a Histologic scores for morphology of tenocyte nuclei in tendon biopsies taken from autologous conditioned serum (ACS)-treated versus control superficial digital flexor tendons (SDFTs) at different time points during the examination period of 190 days. b Histologic scores for fibre alignment in tendon biopsies taken from ACS-treated versus control SDFTs at different time points during the examination period of 190 days. c Percentage of collagen type I content determined immunohistochemically in tendon biopsies taken from ACS-treated versus control SDFTs at different time points during the examination period of 190 days. Day (d)0 = day the diagnosis was made; d36/d190 = 36/190 days after tendinopathy was diagnosed. *p < 0.05. ACS group, n = 10 limbs (SDFTs treated with a single injection of ACS); controls, n = 7 limbs (SDFTs treated with a single injection of control substance or left untreated)