Every person has cancer cells continuously present in their body that the immune system constantly destroys.
"the cancer cells that we all have in our body, FYI, we all have them, but your immune system is constantly destroying them." (said at 0:29:35)
The claim states that every person has cancer cells continuously present in their body that are constantly destroyed by the immune system. In immunology and oncology, the framework of cancer immunoediting recognizes an "elimination phase" (or immunosurveillance), in which the immune system detects and destroys nascent transformed cells. Furthermore, genomic sequencing shows that healthy individuals accumulate somatic mutations and clonal expansions in normal tissues throughout life. However, phrasing this as "we all have cancer cells" is a slight oversimplification; histologically normal tissues accumulate driver mutations and altered cells, but possessing mutated or aberrant precursor cells is not clinically or pathologically synonymous with having malignant cancer. The core physiological mechanism of immune elimination (immunosurveillance) acting against newly transformed or aberrant cells is well supported.
- supports: The immunobiology of cancer immunosurveillance and immunoediting. (Immunity 2004)
"The last fifteen years have seen a reemergence of interest in cancer immunosurveillance and a broadening of this concept into one termed cancer immunoediting. The latter, supported by strong experimental data derived from murine tumor models and provocative correlative data obtained by studying human cancer, holds that the immune system not only protects the host against development of primary nonviral cancers but also sculpts tumor immunogenicity. Cancer immunoediting is a process consisting of three phases: elimination (i.e., cancer immunosurveillance), equilibrium, and escape." (abstract, passage verified)
pubmedfull study (doi) - supports: Cancer immunoediting: antigens, mechanisms, and implications to cancer immunotherapy. (Annals of the New York Academy of Sciences 2013)
"Accumulated data from animal models and human cancer patients strongly support the concept that the immune system can identify and control nascent tumor cells in a process called cancer immunosurveillance." (abstract, passage verified)
pubmedfull study (doi) - context: Clonal Evolution in Healthy and Premalignant Tissues: Implications for Early Cancer Interc… (Cancer prevention research (Philadelphia, Pa.) 2023)
"Histologically normal human tissues accumulate significant mutational burden with age. ... Interestingly though, the presence of these mutations and positive clonal selection in isolation remains a poor indicator of potential future cancer transformation in solid tissues." (abstract)
pubmedfull study (doi)