Pioneer Valley Life Sciences institute View Institution's Website 1 article published in JoVE Biology Mammary Epithelial Transplant Procedure Karen A. Dunphy1,2, Luwei Tao3, D. Joseph Jerry1,2 1Department of Veterinary and Animal Sciences, University of Massachussetts, 2Pioneer Valley Life Sciences institute, 3Molecular and Cellular Biology, University of Massachussetts This article demonstrates the procedure developed by DeOme KB et al. (1959) and the sparing procedure developed by Brill B et al. (2008) for clearing the 4th inguinal mammary fat pad of a pubescent mouse in preparation for transplantation of mammary fragments, mammary epithelial cells, or mammary tumor cells.