crackpot idea

Marie's tumor is supposed to be a benign Grade II growth that was generally treated with surgery and or radiation. Topotecan is a chemical that was being used for other forms of cancer. So why would the FDA have ever approved the chemical for neurocytoma. For all I know the FDA may have never been asked to consider it. I don't know. But the way the insurance company said no it was if they were trying to protect Marie from some crackpot idea. At least that's how I interpreted it.