I found multiple published articles by NIH and the American Cancer Society. The most recent NIH article was published in 2017 and is the most promising, stating that "Pulmonary carcinoid tumorlets are rare, benign lesions". In the papers spanning the previous 10 years, there is more uncertainty, generally concluding sometimes they develop into tumors but most times they remain small. By definition, a tumorlet is defined by size - less than 0.5 cm or 5 mm in diameter. Overall, nothing to worry about and you should focus on being happy the tumor is gone!

I was pretty open about my cancer, so when I sent to my 40th high school reunion last year, most of the guys already knew. (I attended an all male, Jesuit high school.) I heard a lot of stories about guys that had gone through pancreatic cancer. But most relevant to this thread is the one friend who pulled me aside and confided that he has survived 3 types of cancer and currently has one that will eventually kill him. By profession, he is a Psychiatrist who has worked with numerous cancer patients prior to and during his own experiences. He kept in touch after the reunion and helped me as I was going through chemo and radiation. The most important lesson he shared with me was "You have to give yourself permission to rest." I've found this to be good advice.

Keeping you in my prayers.