Can fat grafting to breasts after double mastectomy promote the regrowth of residual breast tissue and breast cancer?

Fat grafting is the process of taking fat from one part of the body and moving it to another.  Commonly liposuction of the abdomen or thighs harvests the fat.  The fat is then prepared and injected into areas to help the contour of the breasts after a reconstruction.  The grafted fat does not cause regrowth of breast tissue.  It also has not been shown to have any increase in the cancer risk.  Always discussing these issues with your board certified plastic surgeon prior to surgery is recommended. 

Very interesting question. Fat grafting has being in use for several years and every day more surgeons around the world experience its wonderful benefits in different tissues and organs. Fat is considered one of our owns  source of healing tissue. Share your concern  with a certified PS. Now fat tissue is under several researches studies around the world . Nevertheless, at this moment there is no evident of any harmful or whatsoever caused by fat cells transferring. Best Wishes

There were concerns about this in the past that appear to be unfounded.  I am not aware of any studies that would suggest this is a risk.