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. 2017 Aug 18;7:8708. doi: 10.1038/s41598-017-07812-6

Figure 1.

Figure 1

Hematoxylin and eosin staining and histopathological scores of Achilles tendons after an intratendinous injection of collagenase or only needle punctures. Control (a) and injured tendons at weeks 1 (b), 4 (c), and 8 (d). The summary of histopathological score (e). CR, calcified deposits; arrowhead, chondrocyte-like cells; arrow, vascular structure. The histopathological scores: *compared with the Control group; +compared within the Collagenase group; */+p < 0.05; **/++p < 0.01; ***/+++p < 0.001.