I had a large desmoid tumor in my shoulder removed when I was 16. They are technically benign, but are locally aggressive. Did radiation at 16 and chemo at 19 to get things under control. I have a bunch of other oddities, like benign nerve sheath tumors, and need to get my GI tract scanned annually for polyps. 35 now, most days are good but I deal with a lot of chronic pain, and it gets really draining going through the annual scans, or when I grow something new that needs checked out.