Bilateral traumatic rupture of the infrapatellar tendon.

This is a case report and discussion of the traumatic lesion of bilateral rupture of the infrapatellar tendon in a 52-year-old man. This injury is very rare and seems not to have been previously documented. The treatment consists of surgical repair and cast immobilization. Bilateral rupture of the infrapatellar tendon should be suspected when after injury a patient is unable to actively extend his knee.