Final answer:
Cancer staging involves classifying cancer based on factors like tumor size and spread. It helps determine tumor aggressiveness and guide treatment decisions.
Step-by-step explanation:
Cancer staging is the process of classifying cancer based on factors such as the size of the tumor and the extent to which it has spread. This classification helps determine the aggressiveness of the tumor and guides treatment decisions. Staging systems vary for different types of cancer, but commonly include stages like in situ (abnormal cells present but not spread), localized (limited to the original site), and regional (spread to nearby lymph nodes or tissues).