Retroperitoneal laparoscopic partial nephrectomy: surgical experience and outcomes.

Area of Science:

• Urology
• Minimally Invasive Surgery
• Oncology

Background:

• Partial nephrectomy is the gold standard for small renal masses.
• Minimally invasive techniques aim to reduce morbidity while maintaining oncologic control.
• The retroperitoneal approach offers potential advantages in certain patient populations.

Purpose of the Study:

• To evaluate the perioperative outcomes of retroperitoneal laparoscopic partial nephrectomy (RPPN).
• To assess oncologic control and renal function preservation after RPPN.
• To compare outcomes of RPPN with established open and transperitoneal approaches.

Main Methods:

• Retrospective analysis of 110 consecutive RPPN cases performed by a single surgeon over 72 months.
• Patients positioned in the flank, retroperitoneal space developed with a balloon dissector.
• Intraoperative sonography for tumor assessment, bulldog clamps for hilar control, and retrospective data analysis at mean 23-month follow-up.

Main Results:

• Mean operative time was 199.7 minutes, mean postoperative stay was 2.6 days, mean blood loss was 260.0 ml.
• Mean tumor size was 2.4 cm; 63.7% were renal cell carcinoma with negative margins.
• Low complication rate (4.5%), one local recurrence at 1 year, and preserved renal function (mean creatinine 1.3 mg/dl postoperatively).

Conclusions:

• RPPN is a safe, feasible, and oncologically sound approach for partial nephrectomy.
• The retroperitoneal approach facilitates containment of fluids outside the peritoneal cavity.
• Intermediate-term results show excellent cancer control and preserved renal function, comparable to other methods.