How Much Fat Needs to Be Left Behind After Lipo to Have the Best Results?

I am a 30 yr old who had lipo on my tummy a year ago. I'm 5'6", 118 lbs, but have a tummy pooch. The surgery reduced it somewhat, but I still have fat right near my belly button. It's especially noticeable when sitting or bending. I understand everyone gets "folds" on their tummy when they bend over. I have them on the upper part of my belly and those do not bother me, only the pooch does. I went back to the Dr who did the surgery, he said nothing can be done. Just wanted a 2nd opinion?