Hi Debbie,
Just wanted to let you know that sometimes CT scans don't always give you an accurate account of the cancer. The CT scan on my husband didn't locate the base of tongue cancer. The MRI did. Also the PET scan showed that there were only cancer cells left in the tongue and not any new growths in the nodes. Better to catch any new growths at their earliest and the PET scan does just that. Keep up posted.
Take care,
Wendy