What term describes the manner in which cancer spreads?

The term that describes the manner in which cancer spreads is "metastasis." This process refers specifically to the ability of cancer cells to break away from the original tumor, invade surrounding tissues, and spread to other parts of the body, typically through the bloodstream or lymphatic system. Metastasis is a critical factor in cancer progression and is often what makes cancer more difficult to treat, as it can lead to the establishment of secondary tumors in vital organs or tissues far from the primary site. Understanding metastasis is essential in oncology and for developing treatment strategies, as the presence of metastatic cancer significantly influences prognosis and therapy options.