Neuroblastoma almost always develops before age 5. It can occur in babies before they are born. Neuroblastoma is very rare in children over age 10.

What age is neuroblastoma diagnosed?

The average age of children when they are diagnosed is about 1 to 2 years. Rarely, neuroblastoma is detected by ultrasound even before birth. About 9 out of 10 neuroblastomas are diagnosed by age 5. It is rare in people over the age of 10 years.

What ages are most commonly affected by neuroblastoma?

Almost 90% of neuroblastoma is found in children younger than 5. The average age of diagnosis is between 1 and 2 years old. Neuroblastoma is the most common cancer diagnosed in children younger than 1. It is rare in people older than 10.