[Retroperitoneoscopy: minimally invasive renal surgery].

OBJECTIVE: Retroperitoneal laparoscopy is well known as a surgical technique in adult patients. Its use in pediatric surgery is still-recent but, because of the good results, retroperitoncoscopy indications are getting more acceptance and widening indications. The aim of this work is to analyze our initial experience in retroperitoneal laparoscopy procedures in urological diseases at our centre. PATIENTS AND METHODS: From July 2001 to February 2002 retroperitoneal laparoscopy has been used in 6 patients aged 6 months to 14 years. Surgical indications were: pyelolithotomy (lithiasis non-subsidiary to extracorporeal shock wave lithotripsy (n = 1); nephrectomy ofmulticystic dysplastic kidney (n = 4); and nephrectomy of atrophicpelvic kidney (n = 1). RESULTS: Mean operative time in nephrectomy has been 102 minutes, and 230 minutes in conservative surgery. All 5 patients nephrectomized were discharged 24 hours after operation with no postoperatory incidences. The patient operated on for pyelolithiasis (in which a external drainageand a pyelouretheral stent (pig-tail) was placed) remained one week until he could be discharged without drainage. The pig-tail stent was thrown out spontaneously three weeks later through the urethra. Follow up demonstrated no stenosis in this case and no complications in nephrectomy patients. CONCLUSION: Retroperitoneal laparoscopy is effective and safe in renal surgery and surpasses transperitoneal laparoscopy because its safety in reconstructive surgery avoiding urine leakage risk into the abdomen.