Evaluation of changes in serum and dialysate levels of cancer antigen 125 in stable continuous ambulatory peritoneal dialysis patients.

To estimate the relationship between changes in the concentration of cancer antigen 125 (CA125) and peritoneal membrane kinetics, the permeability characteristics of 44 continuous ambulatory peritoneal dialysis (CAPD) patients who had been treated with peritoneal dialysis for at least six months were prospectively evaluated. Twenty-seven males (age 66 +/- 6 years, duration of CAPD 35.5 +/- 29 months) and seventeen females (age 63.