Sentinel lymph node biopsy in pediatric Wilms tumor
Topic overview
Study of 20 pediatric Wilms tumor patients demonstrates sentinel lymph node biopsy is feasible and accurate for staging when radiotracer is injected after vascular ligation during nephrectomy. Technique identified sentinel nodes in all patients with 15% positivity rate and no false negatives, suggesting improved staging accuracy.
Key takeaways
- Sentinel lymph node biopsy is feasible in pediatric Wilms tumor with 100% sensitivity when radiotracer injected after vessel ligation
- Inter-aortocaval space is the most common sentinel node location in Wilms tumor
- Ligating renal artery and vein before radiotracer injection reduces background interference and improves sentinel node detection
- 15% of patients had positive sentinel nodes; no false negatives were detected using this technique
- SLNB may improve staging accuracy in Wilms tumor while potentially reducing extent of lymph node dissection
Comments