Unusual presentation of bladder neuroblastoma in a child: A case report.

Background: Neuroblastoma is an extracranial malignant tumor in children that is most often located in the adrenal gland and sympathetic ganglion. Here, we present a rare case of neuroblastoma originating from the urinary bladder.

Case Summary: A 3-year-old girl presented with lower abdominal pain with micturition. Ultrasound revealed a lower abdominal mass. Abdominal computed tomography scan displayed a solitary mass at the top of the urinary bladder. Blood levels of neuron-specific enolase and lactate dehydrogenase were elevated. We treated the child with partial cystectomy and six courses of chemotherapy, and the outcome at 4-year follow-up was unremarkable.

Conclusion: Neuroblastoma should be considered when tumors are located in the urinary bladder, especially in the dome; although this presentation is rare, the prognosis is very good.