Supporters cite a recent 12-month clinical trial that indicates the procedure might be effective for cancer patients wanting to fill in defects in the appearance and feel of the breast.
During the surgery, fat is harvested from a patient's stomach or thighs to build up the breast. Around half the fat is then enriched with more stem cells, which are naturally occurring regenerative cells already found in the fat.
The surgeons' group says more clinical testing should be done, and, in fact, several trials are underway.
A Japanese study involving 40 women found that cell-enriched fat grafting was safe, but the same study qualified its own research as preliminary and needing follow-up. None of the studies so far has shown major side effects.