Routine breast cancer screening does reduce death risk, an independent panel of experts reported in The Lancet. However, the practice also results in overdiagnosis; cases of women with false positive results, having to have unnecessary biopsies and other interventions, or patients undergoing treatment for harmless tumors. Experts and patient groups have been debating when breast cancer screening should start, and how often it should occur. It used to be once a year as soon as the woman is 40...
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