Spontaneous bilateral rupture of the extensor mechanism of the knee in two patients on chronic ambulatory peritoneal dialysis.

Two cases of patients on Chronic Ambulatory Peritoneal Dialysis (CAPD) who suffered bilateral, spontaneous rupture of the extensor mechanism of the knee are presented. In neither case was the diagnosis readily apparent. Both patients did well with standard surgical treatment. A review of the literature and consideration of the mechanism of tendon rupture is presented.