■ Tissue expander is a specialized type of implant that has a port located inside of it that allows fluid to be injected (Tissue Expander Expansion Completed In Office) so that the size of the expander can slowly increase over time which will stretch the skin to create a “pocket” for the implant or the reconstructed breast under the skin. This creates space so that eventually in a second stage at a later date, it is possible to put a larger Implant into the breast or to perform Autologous Based Reconstruction to complete the reconstruction.