My partner has been diagnosed with advanced bowel cancer .

He has had his first round of chemotherapy but now they have found he has this protein In his blood and it means the cancer cells are mutating, and they are going to put him on stronger chemotherapy because the one he is on probably won’t do anything.

We know the cancer can’t  be cured, they are hoping to be able to manage it, but I’m really scared , does this mutation mean it’s worse than it already was ?