Impact of Pulmonary Tumor Burden in Favorable Histology Wilms Tumor Outcomes: A Report From the Children's Oncology Group Study AREN0533
Topic overview
COG study AREN0533 analyzed 251 children with favorable histology Wilms tumor and lung-only metastases, finding that chromosomal 1q gain was a stronger predictor of outcomes than pulmonary tumor burden. Rapid responders avoided lung radiation while maintaining comparable survival to those requiring intensified therapy.
Key takeaways
- 1q gain is a stronger prognostic indicator than pulmonary tumor burden in stage IV favorable histology Wilms tumor with lung-only metastases.
- Rapid complete responders to DD-4A chemotherapy can avoid lung radiation without compromising outcomes regardless of initial nodule count.
- Size of pulmonary metastases correlates with event-free survival in rapid responders but not in slow/incomplete responders receiving intensified therapy.
- Number of lung nodules does not significantly predict outcomes in either rapid or slow responders when stratified by treatment response.
- Slow responders require intensified chemotherapy (Regimen M) plus lung radiation regardless of initial pulmonary tumor burden.
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