There is an increased risk of developing breast cancer in the future. It is about four times the lifetime risk.
At 5 years after the diagnosis of atypical hyperplasia, 7 percent of the women may develop breast cancer. At 10 years after the diagnosis, 13 percent may develop breast cancer and at 25 years after the diagnosis, about 30 percent may develop breast cancer.
The risk of cancer may be decreased by taking oral medications like Tamoxifen, Raloxifene, aromatase inhibitors and avoiding hormonal replacement therapy.
Women with atypical hyperplasia should continue with monthly breast self-examinations in order to detect any early breast changes as well as consider annual mammograms, in view of the increased risk.
