The most common method of breast reconstruction currently performed in the US uses tissue expanders and breast implants. This can be performed as a one-step (single-stage) or multiple-step procedure, with or without Alloderm.
The first stage involves placement of tissue expanders. This can either be done at the time of the mastectomy (for immediate reconstruction patients) or after the mastectomy has healed (for delayed reconstruction patients). Expanders are essentially temporary implants that act as spacers.