What does metastasis refer to?

Metastasis refers to the spread of cancer cells from the original (primary) tumor to other parts of the body, potentially forming secondary tumors. This process involves the detachment of cancer cells from the primary site, their entry into the bloodstream or lymphatic system, and subsequent establishment and growth in distant organs or tissues. Understanding metastasis is crucial because it significantly impacts the prognosis and treatment options for cancer patients. Differentiating it from other terms, metastasis specifically indicates that the cancer has advanced beyond its original location, which is essential for determining the stage of the disease and the appropriate course of action for patient care.