Welcome Tev's

I would have been scared myself if I coughed up a piece of my inside. That's good you took it to another doctor to be identified. Papilloma's are benign HPV growth, and are likely to come back. There is no way to know which dysplasia is likely to transform to cancer, and seen rates from 3-15% for moderate dysplasia, which in between mild and severe. Did you have a stem cell transplant with the bone marrow transfusion, and GVHD, which I don't much about. but I recall that this increases the risk of oral cancer, how long after, I don't know, and to mention,

I wish the best on your follow-ups, and continued negative cancer findings.