The combination of the TT and BBL can be performed in healthy patients by a board certified plastic surgeon who is an expert in both and can perform the combination in 4 hours or less.Performing the surgeries at the same time is not an issue. I usually advise performing the liposuction of the abdomen, sides, and back with the fat transfer to the buttocks first. Then return 3 to 6 months later and perform the TT. This will will add a measure of safety. In addition, recovery will be easier. The TT will prevent you from resting on your stomach, and the BBL will prevent you from resting on your back or butt.Kenneth Hughes, MD, Board Certified Plastic SurgeonLos Angeles, CA