Enucleative surgery for stage I nephroblastoma with a normal contralateral kidney

Area of Science:

• Pediatric Oncology
• Surgical Oncology
• Nephrology

Background:

• Tumor enucleation is generally not recommended for pediatric nephroblastoma with a normal contralateral kidney.
• In adults with unilateral renal cell carcinoma, enucleation preserves renal tissue and does not increase the risk of residual disease.
• Chemotherapy can reduce relapse risk in nephroblastoma, making organ-sparing surgery potentially more feasible in children.

Purpose of the Study:

• To prospectively evaluate the feasibility of enucleative surgery in children diagnosed with stage I unilateral nephroblastoma.
• To assess if tumor enucleation can be a safe and effective alternative to radical nephrectomy in this pediatric population.

Main Methods:

• A cohort of 13 children with nephroblastoma and a healthy contralateral kidney were assessed between 1992 and 1995.
• Eligibility criteria included stage I disease, well-defined tumor margins on CT scans, and potential preservation of at least 50% of kidney function.
• All eligible patients received preoperative and postoperative chemotherapy.

Main Results:

• Three out of four children meeting preservation criteria underwent successful tumor enucleation without complications like hypothermia or vascular occlusion.
• Tumor locations included the mid-kidney (2 cases) and upper renal pole (1 case).
• At follow-up periods of 49, 48, and 26 months, all three children remained disease-free with near-complete restoration of renal function.

Conclusions:

• Preliminary findings indicate that enucleative surgery is a potentially reasonable surgical option for carefully selected pediatric patients with stage I nephroblastoma.
• This organ-sparing approach may offer oncological safety and preserve renal function in the long term.