Even with a pet scan they couldn't tell. But, was having trouble breathing, even coughing up blood
and pain in chest and in back. Well, they decided it should come out, thinking it might be malignant, it turned out to be necrotizing granuloma, so they took the whole top half of my lung because when they got in there it was larger than they thought. But, thank my lucky stars it wasn't not malignant at all. But, they couldn't tell unless they went in and took it out to be tested.