Measuring the progression of cancer is vital for treatment planning and prognosis. Metrics such as staging and metastasis are commonly used. Staging involves determining the size of the tumor and whether it has spread to nearby lymph nodes or other parts of the body. The TNM system (Tumor, Node, Metastasis) is a widely used method for staging. Metastasis refers to the spread of cancer from its original site to other parts of the body, which is often detected through imaging studies and biopsies.
