Why 42,000 women still die from breast cancer annually despite effective screening tools—and how to build a personalized strategy that matches your actual risk. Peter Attia breaks down breast imaging modalities, screening intervals, and when to start, revealing that underscreening and mismatched risk strategies are bigger killers than biology alone. Breast cancer found at stage 1 has 96% 10-year survival versus 30% at stage 4, yet roughly 30% of eligible women lack current mammograms and 99.6% of high-risk women who qualify for MRI don't receive it.