Jumper's knee or infrapatellar insertional tendinopathy is a condition primarily found in athletes between 18 and 25 years of age who are engaged in explosive running and jumping sports. It is caused by microtears or partial macrotears through the patellar tendon. Conservative treatment is used as the primary approach. If conservative measures are insufficient or fail to relieve the symptoms, surgery is indicated. The patellar tendon is incised and the hyaline inflammatory tissue is removed. Twenty-six patients have been studied retrospectively, with specific attention to postoperative resumption of sports and residual subjective and objective findings. They all completed a detailed questionnaire and subsequently underwent a physical and ultrasound examination.

Twenty-eight posterior tibial tendon transfers through the interosseous membrane were performed to correct spastic equinovarus. All patients improved their gait, and 82% discarded their brace. Foot striking at the beginning of the stance phase was good or satisfactory in 82%; 68% had a neutral position of the heel. The overall score was good in 68%, satisfactory in 21%, and poor in 11%. The main requirements for obtaining good results with this type of transfer are: no fixed varus deformity preoperatively, age at operation between 5 and 10 years, and reinsertion near the midline of the foot.