About Neuroblastoma What is neuroblastoma? How dangerous is neuroblastoma? Neuroblastoma is a very complex cancer and there are many different types that behave very differently. At one end of the spectrum are benign tumours that may even resolve spontaneously, while at the other end are aggressive tumours with an average survival rate of only 50%. The cure rate for these “high-risk” tumours has only improved marginally in recent years but there is clear hope that this rate will change with some new drug discoveries coming through.