Figure 2.

Lateral epicondylitis in a 59-year-old man with tendinosis of the right common extensor tendon. A−C, Longitudinal US image of the common extensor tendon origin shows hypervascularity (arrow heads), marked heterogeneity with numerous hyperechoic calcifications (arrows) and hypoechoic intrasubstance tears throughout the tendon, findings consistent with severe chronic tendinosis. D, Local administration of polydeoxyribonucleotide (PDRN) was performed on the common extensor tendon. E & F,) Ultrasound imaging of the common extensor tendons obtained two weeks after the procedure showed complete resolution of hypervascularity, although there was no significant change in the findings of tendinosis.