Question Regarding Sacral Fat Pad and Low Back Liposuction? (photo)

I am looking forward to an upcoming consultation in 3 weeks for abdominoplasty with liposuction of flanks, possibly low back. I carry extra skin on the front, but I have always noticed a sacral fat pad, regardless of weight, and with the flank and upper posterior hip fullness, it gives my bottocks a flatter appearance. Does the sacral fat pad respond well to lipo? Given its proximity to the bone and lack of underlying tissue are there any special considerations that I should ask my surgeon about?