Determining Cancer Stage
Staging follows, classifying cancer from Stage 0
(in situ, non-invasive) to Stage IV (metastatic, spread to distant organs). The TNM
system—assessing Tumor size, lymph Node involvement, and Metastasis—is widely used. A
Stage II colon cancer diagnosis, for instance, might indicate a larger tumor without
distant spread, guiding surgery as a primary treatment. Early detection through
diagnosis significantly boosts survival; as per research, there is a 5-year survival
rate of 91% for localized breast cancer versus 31% for metastatic cases (American
Cancer Society, Cancer Statistics Center).