Fig. 1A–B.

The normal tendon and tendinopathy tendon is shown. (A) Normal tendon has parallel, longitudinal architecture with scattered elongated tenocytes. (B) Tendinopathy tendon shows disorganized collagen architecture, high cellularity of rounded tenocytes. (This figure was published in Soslowsky LJ, Thomopoulos S, Tun S, Flanagan CL, Keefer CC, Mastaw J, Carpenter JE. Neer Award 1999. Overuse activity injures the supraspinatus tendon in an animal model: a histologic and biomechanical study. J Shoulder Elbow Surg. 2000;9:79–84, © Elsevier 2000, with permission.)