The approval of eflornithine (brand name Iwilfin) for pediatric high-risk neuroblastoma offers an interesting example of how the FDA evaluates single-arm trials supported by external control arms (ECAs). External controls are increasingly common in oncology and rare disease drug development, but they remain a source of careful regulatory scrutiny. In this case, the FDA’s assessment… Continue reading Regulatory Insights from FDA Review of the External Control Arm in a Pediatric Rare Disease Trial