I can only say, for what concerns the breast issue,that I am sure that your mother's Surgeon/Oncologist has a specific plan to treat her condition.
I hope your mom has a good prognosis from this and will get through her treatment successfully.
The lung issue,is a different matter that will have to be discussed with her Pneumologist.
In the meantime,you could also post in these two Forums, (regarding lung problems) by clicking on the links below..
All the best to both of you .