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NCI Dictionary of Cancer Terms


atypical ductal breast hyperplasia  listen  (AY-TIH-pih-kul DUK-tul brest 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 breast hyperplasia increases the risk of breast cancer. Also called ADH and atypical ductal hyperplasia.