breast hyperplasia ductal breast hyperplasia breast epithelial hyperplasia epithelial hyperplasia of breast ductal hyperplasia of breast Laura Huerta UMLS:C0741698 epithelial hyperplasia of the breast Hyperplasia of the epithelial cells in the breast ducts. It includes the atypical ductal hyperplasia, papillary intraductal hyperplasia, intraductal myoepitheliosis, and ductal hyperplasia of the usual type. ductal hyperplasia of the breast NCIt:C9492