https://greenmedinfo.com/blog/research-radiotherapy-causes-cancer-blueberry-kills-it

Research confirms radiotherapy drives invasiveness within cancer, as well as the power of natural substances to strike to the heart of cancer malignancy.
An important study reveals both the abject failure of conventional radiation treatment for cancer, and the very real possibility that blueberries contain a curative compound far more effective than anything modern cancer specialists have available to them to strike at the very root of cancer malignancy.
Published in the journal eCAM and titled, "BlueBerry Isolate, Pterostilbene, Functions as a Potential Anticancer Stem Cell Agent in Suppressing Irradiation-Mediated Enrichment of Hepatoma Stem Cells,"[1] researchers reported two major findings:
1. Irradiation of liver cancer cells (hepatoma) with the same type of radiation used to treat cancer patients resulted in enriching the highly malignant cancer stem cell subpopulations, as well as cell properties associated with increased invasiveness and treatment resistance. [see figure 1 below]
2. The addition of pterostilbene, a stilbenoid chemically related to resveratrol and found in blueberries and grapes, suppressed the adverse changes associated with irradiation.

The figure above shows the enrichment of the CD133 cell marker, and list of 5 additional cellular markers (e.g. c-Myc) indicates enhancement of "stemness" (i.e. malignancy) following radiation treatment.