Neuroblastoma in a Newborn Female.

Neuroblastoma is the most common solid tumor in neonates. Although often aggressive in older children, carrying high mortality rates despite multimodal therapies, neuroblastoma appears to behave differently in the neonatal population. When diagnosis is clear, the disease can often be managed with close observation alone. This is a case of neuroblastoma in a 4-day-old female managed with surgical resection. This case highlights the potential challenges of diagnosis of retroperitoneal masses on prenatal ultrasound and in newborns and the importance of utilizing available resources when making difficult decisions in management.