Dictionary of Cancer Terms
View in Spanish: Hiperplasia ductal atípica
Atypical ductal hyperplasia (AY-TIH-pih-kul DUK-tul HY-per-PLAY-zhuh)
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 atypical ductal hyperplasia increases the risk of breast cancer. Also called ADH and atypical ductal breast hyperplasia.
Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.