I had surgery 12/2017 for a tumors in my chest on my thymous gland thought it was lymphoma. Came back no cancer. Had my 6 month scans and it grew back. Went in for surgery again Jan of 2018 . Tumor came back this time with langerhans histiocytosis cell . It is very RARE. What I know about it is it can effect your bones your organs and ur skin. It causes bone lessions.which I have in my wrist.i also had my hip fully replaced in 2015 because it was literally falling apart and nobody knew why. Now I know why. I was told to stop smoking because it aggravates it. I had a full body bone scan in scheduled for a brain MRI and a pet scan so they can stage it out. So for me it's cause tumors and bone lesions . I may have to get radiation on wrist and surgery. So as of now that is all I know.