What term describes the spread of cancer to other parts of the body?

Metastasis is the term used to describe the process by which cancer cells spread from the original tumor site to other parts of the body. This occurs when cancer cells break away from the primary tumor, travel through the bloodstream or lymphatic system, and establish new tumors in other organs or tissues. Understanding metastasis is crucial because it significantly affects the staging of cancer, treatment decisions, and prognosis for the patient.

Remission refers to a period during which the signs and symptoms of cancer decrease or disappear, but it does not imply the spread of cancer. Recurrence describes the return of cancer after treatment and is distinct from the initial spread of the disease. Oncology is the branch of medicine that deals with the diagnosis, treatment, and research of cancer, but it is not a term that specifically refers to the spread of cancer.