[Simultaneous rupture of the patellar tendon and the contralateral quadriceps tendon in chronic kidney insufficiency].

Simultaneous ruptures of the patellar tendon and the contralateral quadriceps tendon, happening either spontaneously or with a preceding minor trauma, is a rare event especially in young patients. Major degenerative changes in the tendons' structure are most often a prerequisite for a trauma such as this. The reasons for these excessive pathological findings in tendon tissue structure can be chronic renal failure and resulting secondary hyperparathyroidism. The causal relationship will be discussed in front of a patients case history followed by a review of the relevant literature.