Sorry about your friend, but it may be too late. I would, however, suggest you check out the Gerson Therapy through the Gerson Institute. In his day, Max Gerson claimed a 50% success rate with terminal cancer patients. His book, "A Cancer Therapy", available at many health food type book stores, is worth the read for Gerson's understanding of cancer.
If you want to be somewhat less happy with the cancer establishment you might read "Soil Grass and Cancer" by Andre Voison and then ask the same establishment why cancer is studied and the soil igored?
Best of luck to you and your friend. Don't give up if it seems hopeless, just try harder.