• Ted Sibley, D Adam Algren, and Stefanie Ellison.
• Department of Emergency Medicine, University of Missouri–Kansas City/Truman Medical Center, Kansas City, MO 64018, USA. ted.sibley@tmcmed.org
• Am J Emerg Med. 2012 Jan 1;30(1):261.e3-5.

AbstractSimultaneous bilateral patellar tendon rupture occurs rarely and is even rarer in patients without systemic disease or predisposing conditions. We present a case of bilateral, midsubstance patellar tendon ruptures along with a partial anterior cruciate ligament tear from a fall from a standing height in an otherwise healthy adult without any predisposing conditions. Most patients that sustain a tendon rupture have risk factors for tendonopathy including chronic renal disease, systemic lupus erythematosus, rheumatoid arthritis, or exposure to medications (such as corticosteroids or fluoroquinolones). Currently, there are approximately 50 reported cases of bilateral patellar tendon rupture in the scientific literature; however, only a small minority occurred in patients without any predisposing factors. Most of the reports of a bilateral tendon rupture without systemic disease occurred in the inferior pole of the tendon, with only a few of these occurring in the midsubstance. Because of the rarity of this event in a patient without systemic disease, this condition is often misdiagnosed. Emergency physicians should maintain a high degree of suspicion in those patients with concerning clinical and/or radiographic findings.

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