Can my sister transfer her fat to my body for a buttock augmentation?
No, you can not have your sister's fat transferred to you.
You say you have fat in the abdomen. You can have a dermis fat graft from the abdomen, and whatever fat can be taken from other places. This way you will have a tummy tuck and buttock enhancement.
Yes, a fat transfer from yourself is indeed possible. Fat transfer from a relative is most likely not going to occur without some very expensive testing and costly chronic post operative medication. May I recommend that you consider a consult with one of the many members of the ASAPS that specialize in Lipoabdominoplasty and fat transfer to discuss your concerns?
Gary R. Culbertson, MD, FACS
Use of your own fat for contour enhancement is possible, however, use of your sister's fat is not. Unless she is an identical twin, her fatty tissues are genetically different enough to trigger a rejection (immune) response in your body. This will not only cause loss of the fat graft, but also may lead to inflammation and scarring in the area.
Fat grafting is like all other types of transplants. Only the fat from the patient or identical twin can be used for grafting in the buttocks or other parts of the body. There is usually more fat on the body than you think. It can be taken from the abdomen, hips, medial thighs, etc.