[Simultaneous bilateral spontaneous rupture of the quadriceps tendons compared with unilateral traumatic rupture].

A rare case of simultaneous, bilateral and spontaneous rupture of the quadriceps tendons is described in a 59-year-old man without systemic disease or traumatic lesions. For comparison, we report the case of a young woman with complete traumatic, unilateral rupture of the quadriceps tendon. The more or less normal degenerative changes of the ligament structure were considered to be the additional etiological reasons for both ruptures. A review of the literature is given.