I have a mass on the left lung; non-smoker; any non-cancer masses?

Yes: The large majority of lung masses in non-smokers are old scars. In my part of the country, it's usually histoplasmosis, but a variety of other inflammatory or bnign neoplastic situations can give a lung mass. The radiologist can usually tell whether cancer is a possibility and if so, the pathologist will need to get tissue. Good luck and thanks for asking.