Retroperitoneoscopic partial nephrectomy using microwave coagulation for small renal tumors.

Area of Science:

• Urology
• Minimally Invasive Surgery
• Oncology

Background:

• Small renal tumors are increasingly detected.
• Partial nephrectomy is the standard treatment for localized renal tumors.
• Minimally invasive techniques are preferred for renal tumor resection.

Purpose of the Study:

• To evaluate the efficacy and safety of retroperitoneoscopic partial nephrectomy using a microwave tissue coagulator for small renal tumors.
• To assess the feasibility of controlling bleeding during the procedure without renal artery occlusion.

Main Methods:

• Eight patients with T1N0M0 renal tumors (<5cm) underwent retroperitoneoscopic partial nephrectomy.
• A microwave tissue coagulator was used to coagulate parenchyma around the tumor.
• Tumor resection was performed using scissors and bipolar forceps.

Main Results:

• All eight patients completed the procedure successfully with an average operative time of 295 minutes and blood loss of 129ml.
• Three patients experienced urine leakage, managed by suturing. Two patients required additional resection due to positive surgical margins.
• No recurrence was observed during a mean follow-up of 10.4 months, though one patient had decreased kidney function.

Conclusions:

• Retroperitoneal partial nephrectomy with a microwave tissue coagulator is a viable option for peripheral small renal tumors.
• The technique effectively controls parenchymal bleeding without renal artery clamping.
• Further studies and long-term follow-up are needed to confirm the technique's long-term benefits.