Figure 2

The ultrasound images and ultrasound features scores. At week 8, the collagenase group showed increased tendon thickness, diffuse hypoechoic changes, multiple calcification (a), and abundant neovascularization (c). In the Control group, such ultrasound features were seldom visible (b and d). The summary scores of US features, including echogenicity (e), neovascularization (f), calcification (g), and normalized thickness (h). *Compared with the control group; +compared within the collagenase group; */+p < 0.05; **/++p < 0.01; ***/+++p < 0.001.