Simultaneous bilateral and complete rupture of the quadriceps extensor mechanism.
D000367:Age Factors; D006801:Humans; D007718:Knee Injuries / Q000601:surgery*; D007719:Knee Joint / Q000601:surgery; D008297:Male; D008875:Middle Aged; D012421:Rupture; D013708:Tendon Injuries / Q000601:surgery*