Bilateral spontaneous and simultaneous rupture of the quadriceps tendon.
D002114:Calcinosis / Q000150:complications*; D003095:Collagen Diseases / Q000150:complications*; D006801:Humans; D007717:Knee / Q000000981:diagnostic imaging / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012422:Rupture, Spontaneous / Q000209:etiology; D013710:Tendons / Q000000981:diagnostic imaging / Q000601:surgery