Laparoscopic partial nephrectomy for hilar tumors: technique and results

Area of Science:

• Urology
• Surgical Oncology
• Minimally Invasive Surgery

Background:

• Laparoscopic partial nephrectomy for renal hilar tumors is an advanced procedure with limited existing literature.
• Hilar tumors, defined by proximity to major renal vessels, present unique surgical challenges.

Purpose of the Study:

• To detail the technique and present outcomes of laparoscopic partial nephrectomy specifically for renal hilar tumors.
• To evaluate the feasibility, safety, and initial oncological efficacy of this approach.

Main Methods:

• A retrospective review of 94 laparoscopic partial nephrectomies, identifying 18 cases (19.1%) with hilar tumors.
• Tumor excision involved meticulous dissection from major renal vessels, with procedures performed under cold or warm ischemia.
• Surgical outcomes, complications, renal function (Cockroft formula, renal scans), and pathology were assessed.

Main Results:

• All 18 surgeries were completed laparoscopically with a mean operative time of 238 minutes.
• Mean ischemia times were 42.5 minutes (cold) and 34.1 minutes (warm); estimated blood loss was 165 ml.
• Two major vessel entries occurred, managed laparoscopically. Postoperative scans showed preserved renal moiety function (mean 38.6%). Renal cell carcinoma was confirmed in 77.8% of cases, with one positive margin.
• Median follow-up of 26 months revealed no local recurrence or systemic progression.

Conclusions:

• Laparoscopic partial nephrectomy for hilar tumors is a feasible and safe procedure when performed by experienced surgeons.
• Initial oncological results appear promising, but extended follow-up is required for definitive long-term assessment.