[Peritoneal dialysis in patients with polycystic kidney disease]

In Austria, patients with end-stage renal disease caused by polycystic kidney disease are less frequently treated with peritoneal dialysis (PD) than patients with noncystic renal diseases (6% versus 8%). In contrast, the United States renal data system reports that more than one fifth of patients with polycystic kidney disease choose PD as their initial form of renal replacement therapy. The reasons for this difference are unknown. Extrarenal manifestations of the disease, such as diverticulosis, development of hernias or vascular aneurysms, may theoretically promote the occurrence of complications typically related to PD. However, studies undertaken to clarify these questions did not find any difference in the rates of peritonitis caused by diverticulosis or Gram-negative bacteria, and no differences were seen with respect to vascular complications. Nevertheless, in comparison with the general population, patients with polycystic kidney disease are more likely to develop hernias, and the incidence of herniation may be further increased by PD. In conclusion, patients with polycystic kidney disease who also have abdominal complaints such as meteorism and discomfort, or lumbago resulting from the markedly enlarged kidneys, should not be actively advised to have PD treatment. The same is true for patients with recurrent hernias. However, the technical survival, quality of dialysis, duration of therapy and rates of complications in PD are comparable in patients with cystic or noncystic kidney disease, and therefore all patients with polycystic kidney disease who do not have abdominal complaints or history of recurrent hernias should be informed that PD is an adequate form of renal replacement therapy, equally effective as hemodialysis.