ABSTRACT
Peritoneal dialysis is an important therapeutic option for patients with end-stage renal disease, and the peritoneal membrane is the lifeline for peritoneal dialysis patients. Therefore, strategies to maintain the health of the peritoneal membrane are very important. A 64-year-old female who had been undergoing continuous ambulatory peritoneal dialysis (CAPD) for the past 6 years was admitted because of painless gross hematuria. On abdominal computed tomography (CT), a mass was found in her left renal pelvis. A nephroureterectomy was performed via a retroperitoneal approach without any complications. Peritoneal dialysis was resumed 4 hours later. We report peritoneum-preserving nephroureterectomy via a retroperitoneal approach in a patient on CAPD.