18F-mFBG PET Imaging in the Evaluation of Neuroblastoma

This study tests a new PET scan tracer to see how well it detects and monitors neuroblastoma, a type of cancer that mostly affects young children and starts in nerve tissue. **You may be eligible if:** - You are between 0 and 18 years old - You have been clinically suspected of having neuroblastoma or have already been diagnosed - A parent or legal guardian is available to provide consent **You may NOT be eligible if:** - You have serious disease affecting the heart, brain, liver, kidneys, or blood-forming system - You have had significant radiation exposure from other medical studies in the past year - You have received an experimental drug or device within the past month - You have any condition the investigator believes would make participation unsafe Talk to your doctor to see if this trial is right for you.