The spread of cancer cells from one site to others in the body is known as

Metastasis, or metastatic disease, happens when cancer spreads from one organ or part to another part that is not directly connected with it. Scientist used to believe that metastasizing only happens to malignant tumor cells and infections. However, new research has caused this to be reexamined because it was found out that even with the absence of primary tumors, metastatic cancers were discovered adding to the idea that metastasis are not only caused by malignant tumors that leave primary ones.