Quadriceps Tendon Rupture eMedicine

Description: Ruptures of the quadriceps tendon occur relatively infrequently and usually occur in patients older than 40 years. A strong association exists with numerous systemic diseases and prior degenerative changes in the knee extensor mechanism. Ruptures most often occur unilaterally. Bilateral ruptures are highly correlated with systemic disease but have been reported in healthy patients who do not have predisposing factors.
Synonyms and related keywords: extensor mechanism disruption, tooth sign, patellar tendon ruptures, jumper's knee, unilateral quadriceps tendon ruptures, bilateral quadriceps tendon ruptures, quadriceps tendon tear
Lyle & Crosby 2008