Long-Term Outcome of Young Infants With Suspected Neuroblastoma following Observation as Primary Therapy: A Report From the Children's Oncology Group.

Several studies have established that patients with localized perinatal neuroblastoma can be safely observed; however, long-term outcomes have not been previously reported. We evaluated long-term outcomes of infants with suspected perinatal neuroblastoma enrolled on the Children's Oncology Group (COG) ANBL00P2, which included an expectant observation approach. Among 87 eligible patients, the 10-year event-free survival (EFS) was 93.7%, and overall survival (OS) was 98.0%. Most tumors regressed spontaneously; only three patients reported progression to higher stage disease. This report reinforces the long-term safety of non-interventional management in perinatal neuroblastoma, sparing infants unnecessary surgery and associated risks.