Low- or intermediate-risk neuroblastoma is often found in children who are younger than 18 months of age with localized neuroblastoma (this means cancer that has not spread to other parts of the body).
High-risk neuroblastoma can occur in children of different ages; usually high-risk disease is diagnosed in children aged 18 months or more. These children usually have metastatic disease (cancer that has spread to more than one spot in the body) and often have amplification (increased number) of the MYCN gene.
Tests: To find out what type of neuroblastoma a child has, there are several tests, including urine tests and blood tests. There are also imaging tests that help find the cancer and see what it looks like. Some imaging tests may be familiar, such as an x-ray, ultrasound, or CT scan. Others may be new to you, such as an MRI, PET scan, bone scan, or MIBG scan.