Neuroblastoma is a cancer that develops from nerve cells found in several areas of the body. Neuroblastoma most commonly affects children age 5 or younger, though it may rarely occur in older children and adults. Neuroblastoma is the most common cancer in babies. Neuroblastoma develops in tissue that makes up the sympathetic nervous system - the system of nerves that automatically regulates your heart rate, blood pressure and digestion. Neuroblastoma most commonly arises in and around the adrenal glands, which sit atop the kidneys. However, neuroblastoma can also develop in other areas of the...