Even More Evidence That Mammograms Have Been Oversold

FiveThirtyEight: “A study published online today by the The New England Journal of Medicine added to a growing body of evidence that for every woman who has been helped by a mammogram screening1 for breast cancer, many more have been harmed.”

“Screening did result in more cancers being detected, he said, but the data suggests that only about 30 of the 162 additional small tumors per 100,000 women that screening mammograms found would ever have progressed to a dangerous stage. That means that 132, or 81 percent, of the 162 extra tumors detected represented ‘overdiagnosis’ — the discovery and treatment of tumors that were never destined to harm.”

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