I have had oral cancer (squeamish cell) which was removed from my tongue and right side of my neck. Now, I have a spot on my right lung and two months ago the PET/CAT scan showed it at 8cm, now a CAT scan, with a different CT computer shows, it at 20cm. I have two questions; 1. How fast does a lung cancer grow? 2. Could the older CAT computer wi... more