Researchers are unsure why radiation therapy caused more deaths earlier.
I developed an explanation of cancer which may explain The Lancet findings. If anyone is interested, one may read it there. The important point to this discussion is that I think the hormone, DHEA, must be low to trigger cancer. Since I think all tissues live on DHEA, I think cancer does also. Radiation reduces DHEA, so the entire person is adversely affected by low DHEA, but the cancer is more affected.