Retrograde intrarenal surgery as a tool for lithiasis management in renal anomalies. Four cases description.

OBJECTIVE

The management of stone disease in renal abnormalities is a challenge for urologist due to its rarity. The aim of the current manuscript is to report our experience in Retrograde Intrarenal Surgery (RIRS) in 4 complex-abdnormal cases using the flexible videoureterorrenoscopy.

MATERIAL AND METHODS

Data was prospectively collected and retrospectively analyzed regarding our first 100 RIRS for stone disease with flexible videoureterorrenoscope (FLEX-X 8.4 Fr- STORZ®) between 2017and 2018. Four patients presented with renal anomalies and stone disease; one horseshoe kidney, polycystickidney, a renal ectopia fused and a caliceal diverticulum. We analyzed demographic variables (age andgender), stone size, previous treatment received, clinical presentation, stone free rate and complication rate using Dindo-Clavien classification.

RESULTS

4 (4%) cases of renal stone disease associated to renal anomalies were identified. All procedures were ambulatory. The mean age was 56 years (43 to 65) being 3 male and 1 female. The average stone size was 16.25 mm (6 to 23). All cases represented recurrent stone disease, initially treated with a primary treatment such as extracorporeal shock wave or percutaneous lithotripsy. The mean surgical time was 57 minutes (43 to 79) and the stone free rate 100%. As complications, one patient presented low back pain at 48 hour safter surgery, which did not yield with oral analgesics requiring intravenous treatment, although without admission (Clavien II).

CONCLUSION

Retrograde intrarenal surgery for the management of renal stone in kidney anomalies is safe, feasible and effective. However; more cases and comparative studies with percutaneous and extracorporeal lithotripsy are needed to optimize treatment decision making.