I edited the previous posting. I wanted to make it clear that you should not put too much weight on any opinion that I express in a matter that is already so subjective. PET's are notorious for lighting up low level SUV's like these, and many people obviously get worried about them. I routinely have levels higher than this in my lungs because of the infections that take place because of my silent aspiration. None of those have been a malignancy. Remember that a PET scan is only one data point on a long line of decision making opportunities. When you get 3+ data points all pointing towards the same thing, it is definitely time to take action.