The final breast volume represents a combination of the breast tissue that is there to start with, plus the implant, which explains why two women with the same size implants may have different breast sizes. The implant simply fills out the breast envelope, so that characteristics of the breast (amount of existing breast tissue, nipple size and position) remain unchanged. With saline-filled implants, size asymmetry may be reduced by simply adding more fluid, or using a slightly larger implant, or both, on the smaller side. The prevalence of existing volume asymmetry explains why the implant volumes are often not identical in the patients shown in this section. Of course, any small size discrepancy is minimized anyway as the volume of both breasts is increased by the presence of the implants.
Perfect symmetry is virtually impossible and, fortunately, unnecessary to get an ideal result- one that is very pleasing to both the patient and her surgeon.