Studies have shown that early detection saves lives and increases treatment options. Mammography is highly accurate but like most medical tests, it is not perfect. On average, mammography will detect about 80% to 90% of breast cancers in women without symptoms. All suspicious lumps should be biopsied for a definitive diagnosis. Recent studies have shown that magnetic resonance imaging (MRI) appears to be more sensitive than mammography in detecting tumors in women with an inherited susceptibility to breast cancer.