Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Neuroblastoma ?
    ### Response:
    Neuroblastoma is a cancer that forms in your nerve tissue. It usually begins in the adrenal glands, which sit atop your kidneys. It may also begin in your neck, chest or spinal cord. The cancer often begins in early childhood. Sometimes it begins before a child is born.
    