One of the primary reasons for early cancer diagnosis is that treatment is often more effective when cancer is detected at an earlier, localized stage. At this stage, the tumor is typically smaller and has not spread to other parts of the body, making it more amenable to curative treatment options such as surgery, radiation therapy, or targeted therapy. Early cancer diagnosis is also associated with higher survival rates. When cancer is identified at an advanced stage, the chances of successful treatment and long-term survival significantly decrease. Early detection allows for timely intervention and a better chance of controlling or curing the disease.