Good question Liz! And I STILL have no 'lung' symptoms at all, it's still my jaw which gives me pain and concern.
But as I understand it, it can just go anywhere at all!
My mum (non-smoker)had a painful leg (age, arthritis, said the doctors). She was finally admitted to A & E almost screaming in pain and unable to walk and they suspected osteomylitis and amputated a toe. Biopsy showed it was secondary cancer--3 weeks later, they still said they couldn't find the Primary, but began palliative raiotherapy on her leg anyway a week after that.
She died a week later from a Pulmonary embollism and they said they 'thought' the primary was in the lung!
We were all too reeling in shock to investigate any further, taking care of dad was more important.
Now, of course, I do my own research and find that the most likely sites for mine to spread to are the brain and the liver.
Throughout my treatment, though, all scans/X-Rays are concentrating on my chest/abdomen/pelvis--my jaw hasn't been even 'looked at' since diagnosis!
Have asked Ray to alert me to any signs of spread to brain, but he just smiles and says 'How would I know??????'
I guess this beast just moves in mysterious ways Liz--anyone else got any thoughts?
Brenda