Thank you to everyone for your responses.
As of now my pulmonary doc and I have agreed to not do the vats biopsy at least for now. He wants to see how I react to a high dose of Prednisone and to completely avoid cigarette smoke.. If I do have pulmonary Langerhans cell histiocytosis complete avoidance of specifically cigarette smoke is key. I quit smoking two years ago however, 5 days a week I've been in my work pickup truck right next to a co worker smoking about ten cigs a day. I was one of the people who thought second hand smoke was harmless. I have a follow up CT scan and a pft at the end of October and see if things have stabilized. I also asked my doc about work related irritants. He said if it is a.p.l.c.h. That these things won't affect it. I've been wearing a high quality mask for almost a month just in case.
I wish the best for all of you. Feel free to message me and let me know how things are going on your end of things. Thanks again for your time
Dan