Mammograms are rarely recommended for women under 30 because the test is not very helpful in detecting cancer in young women.
A younger woman’s breast tissue tends to be very dense and full of milk glands. On a mammogram, this tissue looks white, which makes it almost impossible to see any cancerous growths, which would also be read as white. Many doctors say that trying to find a tumor in the midst of dense gland tissue in a mammogram can be like finding a polar bear in a snowstorm.
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