The alveolus is a component of the primary palate and is formed by the fusion of the maxillary prominences around the fifth to sixth weeks of gestation. The structures that arise from the primary palate are the nose, lip, prolabium, and the premaxilla; all of these structures are anterior to the incisive foramen.

Not all patients seeking autogenous breast reconstruction have sufficient donor tissue for a bilateral reconstruction. Identical twin isotransplantation, as a model system for allotransplantation without immunologic barriers, broadens the definition of "spare parts" surgery. In this case, we demonstrate the simultaneous transplantation of both autogenous and syngeneic deep inferior epigastric perforator flaps for bilateral breast reconstruction. As our understanding of immunology evolves, allotransplantation may further increase our reconstructive options for other postmastectomy patients.