An Encrusted Ureteral Stent Removed by Open Surgery in a Solitary Pelvic Ectopic Kidney (PEK) Patient Presented with Anuria and Renal Dysfunction: A Case Report.

A 19-year-old man complaining of anuria for 1 day was presented. A ureteral stent was indwelled 3 months ago for preventing ureteral obstruction and protecting kidney function. Abdominopelvic computed tomography (CT) scan revealed a solitary pelvic ectopic kidney (PEK) and severe hydronephrosis. And the ureteral stent was covered by encrustations which caused ureteral obstruction. The stent had been retained in his ureter for more than 3 months until he was admitted. It couldn't be removed after shock wave lithotripsy (SWL) or flexible ureteroscope laser lithotripsy (f-URS). Finally, we had to conduct open surgery which was an alternative option. The stent was replaced by a new one successfully. The patient was discharged safely without postoperative complications. After 2 months of follow-up, the patient's renal function remained stable.