The fact is any child could conceivably get a brain tumor. This is because doctors simply aren’t sure what causes brain tumors in children. Yet, in a small number of children, genetics seem to play a role. For example, some children with the disease neurofibromatosis get tumors in their brain or spinal cord. (Neurofibromatosis a genetically-inherited disorder in which the nerve tissue grows tumors or neurofibromas that may be benign or may cause serious damage by compressing nerves and other tissues.)
Also, children who receive radiation treatment to the head for some other form of cancer may have greater risk for a brain tumor later in life. Nonetheless, most children who have a brain tumor have no clear risk factors.