European Urology

Abstract

Background

Management of multiple ipsilateral renal tumors is a dilemma in clinical practice. The effects of minimally invasive nephron-sparing procedures in this group of patients have not been assessed.

Objective

To evaluate the technical feasibility and outcomes of laparoscopic partial nephrectomy (LPN) and laparoscopic cryoablation (LCA) for multiple ipsilateral renal tumors.

Design, Setting, and Participants

Between September 1999 and December 2006, 27 patients were treated with minimally invasive nephron sparing surgery (LPN or LCA) for synchronous multiple ipsilateral renal tumors in a single operating session at our institution. Fourteen patients with 28 tumors underwent LPN, and 13 patients with 31 tumors underwent LCA as the sole treatment modality.

Intervention

Medical records were retrospectively reviewed and data were collected.

Measurements

Demographic, intraoperative, postoperative, and intermediate-term follow-up data were compared between the two groups.

Results and Limitations

Patients in the LPN group had fewer tumors (2 vs. 2.4, p = 0.04) and larger dominant tumor size (3.6 vs. 2.5 cm, p = 0.005) in the affected kidney and lower preoperative serum creatinine levels (1 vs. 1.4 mg/dl, p = 0.02). Compared to the LCA group, patients in the LPN group had greater estimated blood loss (200 vs. 125 ml, p = 0.02) and longer hospital stays (90 vs. 52.3 h, p = 0.02). There were no open conversions, and no kidneys were lost. Complication rate, renal functional outcomes, and intermediate-term cancer-specific survival rates were similar between the two groups.

Conclusions

Both LPN and LCA are viable options for patients with multiple ipsilateral renal tumors in select patients. Renal functional outcomes, complication rates, and intermediate-term survival rates are comparable between the two groups in this small series.