The Progenitor Cell Concept of Proliferative Breast Disease

Professor Bocker stated that while little is known about regeneration, stem cells, or proliferative diseases, it is established that the breast consists in the main of two types of epithelium, glandular and myoepithelial, each deriving from progenitor cells. The current paradigm for breast cancer posits the formation of an intraductal lesion which then proliferates, but this has not been proven.