Scientists have discovered why cancer cells spread around a human body: They actually chase down healthy cells trying to escape. “Researchers are confident that some cancers work according to this chase-and-run principle,” io9.com reports. “Healthy cells try to escape from tumor cells, only to be followed around the body by malignant cells.”
https://gizmodo.com/scientists-may-have-discovered-how-cancer-spreads-aroun-513799545
