This area lies just below the flanks toward the upper, outer area of the buttock. In most women, it transitions into the flank area. I usually do the hip-flank as one unit for patients with disproportionate fullness. The hip-flank mound makes the buttock look square or boxy and takes away from the nice feminine contour between the waist and the buttocks. This area, as well as the outer thighs and saddlebags regions, are the most important areas to shape properly and result in a rounder, more well-defined buttock.