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Microwave ablation versus partial nephrectomy for small renal tumors: intermediate-term results
Wei Guan1, Jian Bai, Jihong Liu
1Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
Journal of Surgical Oncology
|April 11, 2012
Summary
Microwave ablation offers a safe and effective alternative for small renal tumors, showing fewer complications and less blood loss than partial nephrectomy (PN). Longer-term data are needed, but initial results favor microwave ablation for renal tumor treatment.
Area of Science:
- Urology
- Oncology
- Minimally Invasive Surgery
Background:
- Small renal tumors are increasingly detected.
- Treatment options include partial nephrectomy (PN) and ablative therapies.
- Evaluating intermediate-term outcomes is crucial for treatment selection.
Purpose of the Study:
- To prospectively compare intermediate-term outcomes of partial nephrectomy (PN) versus microwave ablation for small renal tumors.
- To assess safety, efficacy, and functional outcomes of both treatment modalities.
Main Methods:
- A randomized trial involving 102 patients with solitary small renal tumors.
- Patients underwent either open or laparoscopic partial nephrectomy (n=54) or microwave ablation (n=48).
- Follow-up averaged 32-36 months, comparing surgical data, complications, oncologic control, and renal function.
Main Results:
- Microwave ablation demonstrated significantly lower estimated blood loss, complication rates, and postoperative renal function decline compared to PN.
- Hospitalization and surgical times were comparable between groups.
- Three-year local recurrence-free survival rates were high for both microwave ablation (91.3%) and PN (96.0%), with no disease-specific deaths.
Conclusions:
- Microwave ablation is a safe and efficient option for treating small renal tumors.
- Intermediate-term findings suggest microwave ablation yields favorable results compared to partial nephrectomy.
- Longer-term follow-up data are necessary to fully establish the durability of these findings.

