Radiation may increase the risk of developing breast cancer in some women.

FOX News Radio's Bill Vitka reports:

To look for cancer, may cause it. Mammograms intended to find breast cancer may raise the risk of developing it. They may in the case of women who have a mutated gene, the BRCA1 or A2 gene. Their risk of developing cancer is five-fold.

For women with a history of chest radiation in their 20's, it's that added radiation and not only from mammograms but X-rays that may elevate the risk. Exposure before age 20 seems to heighten it. After age 30 there seems to be little if any risk.

Bill Vitka, Fox News Radio