I would not expect your curves in the flank area to be less visible after a tummy tuck. If anything taking away some of the excess skin and fat while tightening your muscles may enhance or at least make your curves more noticeable. People with muscles that are naturally contoured in that region can enhance the area by removal of fat (if present) to show the muscle contour but that contour cannot otherwise be created. Enjoy your results and make every effort to get to a healthy and maintainable weight before undergoing surgery.Warm regards,Jon A Perlman MD FACS Certified, Am Board of Plastic Surgery Member, Am. Society for Aesthetic Plastic Surgery (ASAPS) Beverly Hills, Ca