When a cancer cell is killed or dies an immune response occurs.
This means many things are happening that are involved with the immune system. One of the bodies many partners in the immune system is the macrophage cell.
A macrophage cell can literally detect dead cells through smell, much like a scavenger bird detects dead animals. Whenever dead cells reach the part of the bloodstream patrolled by a macrophage, the macrophages surround them and convert dead cancer cells into easily removed components, this is called “Efferocytosis“.