Prayers going heavenward.
Though not a doc, I worked for thirteen years in a Radiation facility. My advice, hit her hard with radiation and chemo; then have the surgeon re-evaluate to see if surgery is then an option. Look for alternative therapies such as immuno enhancement. In other words, use EVERY weapon in the armory and do it fast. Don't wait to see if one is working before using the next.
Father, we ask for wisdom for this couple in order to facilitate healing. Impress them with insight from you as to where and how to find your pathway to her healing.
Especially touch her immune system by both "natural" and supra-natural means in order to terminate the invader and triumph over the threat.
We thank you, also, for supplanting fear with faith and flight with fight; for comforting them and infusing them with a sense of your power and love. We ask it in the Name of your holy Son....Amen.