I don’t know as haven’t had it done but from doing vaser research I remember reading a lot that thighs bruise and swell up a lot more, because ur up on your feet atleast some parts of the day so don’t get to rest as much. Plus gravity pushes swelling downwards (my legs and pubic area were so swollen for over a week and the lowest point down I had vaser on was lower abdomen!!)
So I expect that’s why!! I’m sure once swelling subsides you will see results. The fact your flanks show big difference means vaser must have worked for u 😉
I have also been told by my surgeon though that arms and legs don’t get as perfect results as torso areas, but I’ve seen so many mya patients photos with amazing leg results!!