Hi,
It's possible to achieve a very large cup size with breast tissue expanders, but the largest possible size varies from patient-to-patient. The need for postoperative radiation, the thickness of the breast skin after mastectomy, and the total amount of skin removed all contribute to the final volume that can be achieved. Sometimes, additional skin and soft tissue (i.e a flap) will be added to the implant to add volume.
Even if you can achieve a size match with the contralateral breast, symmetry between a breast reconstructed with an implant and a natural breast is very difficult to achieve without either a breast lift or a breast reduction on the side without cancer. All natural breasts, particularly large ones, develop a certain degree of ptosis (droop) over time; breasts reconstructed with implants don't droop. Without a procedure to raise the breast, symmetry won't really be achieved.
Hope this helps. All the best.
