here's the update on where it has spread. My mom is now considered terminally ill:
-15 mm lymph node
-2.3 cm posterior left upper lobe (left lung) which is adjacent to two smaller nodes measuring 7 mm
-Focal lystic lesion in the L2 vertebral body

We have two option with treatment:
option 1: doing a three combination therapy involving f5-u and cetuximab, pros: this therapy has a better result, cons: there is no alternative therapy

option 2: doing a two combination therapy and if it fails doing cetuximab, pros: there is a second option if first therapy fails, cons: lower results than the first option

Please advise for those who are familiar because I don't know.