Intravenous misplacement of the nephrostomy catheter following percutaneous nephrostolithotomy (PCNL) is extremely rare, and little information is available about this complication. Because the patient’s prognosis may be poor, sufficient attention should be paid to early identification and treatment of this complication. We present an uncommon case of a patient with intravenous nephrostomy catheter misplacement after PCNL at our hospital. In our patient, the tip of the nephrostomy catheter was located in the inferior vena cava. It was successfully managed using two-step catheter withdrawal under fluoroscopy, and the percutaneous nephrostomy catheter was able to be withdrawn 7 to 8 cm back into the collecting system in stages with the surgical team on standby. There were no severe complications such as deep vein thrombosis that developed during or after the catheter withdrawal. Patients could be managed conservatively using intravenous antibiotics, strict bed rest, and tube withdrawal using computed tomography (CT) or fluoroscopy guide in most cases combined with information in the literature. Additionally, open surgery could be used as an alternative treatment.

Scarce data are available on pelvic ectopic renal parenchymal perforation. However, this complication might lead to serious consequences. Clinicians should pay attention to the early identification and treatment of this complication. We herein report the first case of pelvic ectopic renal parenchymal perforation caused by a double-J stent after ureteroscopy. Compared with previously reported cases of renal parenchymal perforation not involving an ectopic kidney, our case involved no renal capsule hematoma and no other serious complications. Our primary management strategy was to review relevant examinations and tests, perform close monitoring, and instruct the patient to stay in bed. The patient recovered smoothly after the ureteral stent was removed 1 month postoperatively.