What is ADH in breast cancer? A benign (not cancer) condition in which there are more cells than normal in the lining of breast ducts and the cells look abnormal under a microscope. Having ADH increases the risk of breast cancer. Also called atypical ductal breast hyperplasia and atypical ductal hyperplasia.
Does ADH increase breast cancer risk? If you’ve been diagnosed with ADH, you have an increased risk of developing breast cancer in the future. Specifically, at five years after the diagnosis of ADH, 7% of women will develop breast cancer, and at 10 years post-diagnosis, 13% of these women will develop breast cancer.
How often does atypical ductal hyperplasia turn into cancer? At 10 years after diagnosis, about 13% of women with atypical hyperplasia may develop breast cancer. That means for every 100 women diagnosed with atypical hyperplasia, 13 can be expetected to develop breast cancer 10 years after diagnosis. And 87 will not develop breast cancer.
Is ADH a precancer? In ADH, the pattern of growth of cells is abnormal and has some (but not all) of the features of ductal carcinoma in-situ (which is a pre-cancer). This means that ADH is not yet a pre-cancer, although it is linked to an increased risk of getting breast cancer later on.