New Consensus Standardizes Surgery for Childhood Wilms Tumor

A new expert consensus published in World Journal of Pediatric Surgery sets out a standardized framework for the surgical management of unilateral Wilms tumor (WT), the most common primary malignant kidney cancer in children. Developed by the Oncology Surgery Group and Urology Surgery Group of the Pediatric Surgery Branch of the Chinese Medical Association, the guidance addresses persistent variations in practice—from upfront surgery versus preoperative chemotherapy to biopsy, nephron-sparing surgery (NSS), lymph node sampling, renal vessel control, tumor thrombus, rupture, recurrence, metastases, minimally invasive surgery (MIS), horseshoe kidney, and special age groups. The consensus offers 34 recommendations based on 17 clinical questions, aiming to reduce tumor rupture, iatrogenic progression, recurrence, and unnecessary organ removal while preserving renal function and improving long-term outcomes.

Key recommendations include immediate radical nephrectomy for resectable tumors, while preoperative chemotherapy is advised for selected patients with high-risk or initially unresectable disease. Immediate surgery is discouraged in cases of confirmed germline WT1 mutation, solitary kidney, severe anesthetic risk, or tumor thrombus above the hepatic veins. Percutaneous biopsy is generally not recommended unless renal origin is unclear, benign or non-WT disease is suspected, or in stage IV patients and those older than 10 years. The consensus emphasizes adequate lymph node sampling—ideally 6 to 10 nodes from specific sites—to improve staging and keep the false-negative rate below 10%. It also stresses complete tumor resection, accurate staging, multidisciplinary care, and evidence-informed surgical judgment. NSS is not routine and requires strict criteria, while MIS may be considered in selected cases at experienced centers.

The authors describe the consensus as a practical framework rather than a rigid protocol, balancing oncologic control with renal preservation and avoiding unnecessary harm. They highlight that conversion from MIS to open surgery should be viewed as sound judgment rather than failure. The guidance targets pediatric surgeons, oncologists, urologists, radiologists, and pathologists, and may also help resource-limited settings guide referral and multidisciplinary planning. The consensus calls for future research to refine patient selection for NSS and MIS, improve rupture prediction, standardize lymph node mapping, and clarify anticoagulation and radiotherapy decisions. The full consensus is available via DOI: 10.1136/wjps-2026-001204.