Hi Mercy ,
It's very difficult to say when it comes to multiple tumours as size and location come into play . A surgeon called Dr Ladas in London does laser surgery on multiple mets but it still has a criteria . Has your mum had a PET scan . My mum has had one lung met but two nodules were showing for a year and suddenly disappeared. So they concluded that they were not cancer . You would be best having her case reviewed by a thoracic surgeon or a radiologist to see if they are able to help in any way .
Chemo actually had a really big role to play in keeping my mum alive .
Take care,
Stu