Journal of American Physicians and Surgeons Volume 22 Number 4 Winter 2017

ABSTRACT – Natural barriers to cancer exist at the molecular, cellular, tissue, organ, and whole-body levels. The cancer barriers are diminished by high radiation doses, facilitating cancer occurrence. In contrast, low radiation doses enhance these cancer barriers, which can lead to threshold and hormetic doseresponse relationships for cancer induction. These facts render the linear-no-threshold (LNT) model for cancer induction implausible