@colleenyoung Thank you! Will see my oncologist and will ask him about the difference between these two as well as his experience with Aden carcinomas occurring with them. My PCP just called to reassure me. She did not want me worrying until seeing the oncologist. She talks with oncologist and he said that these tumorlets are often found when surgery is don't to remove another cancerous nodule and he is not concerned about it. He thinks there is no follow up treatment regarding the tumorlet and he will discuss this with me in detail when I see him a week from this coming Tuesday. My previous PCP retired and I really lucked out with this PCP--she truly cares about one's emotional and physical well-being. Certainly will keep you posted as I find out more. In the meantime, will be reading these posts. I look forward to reading these papers that you and flusshund supplied.