Can one side of your behind grow larger and less proportionally than the other side after BBL?

Hello, I've heard it countless times, "your butt will grow or shrink depending on weight gain/loss after Bbl." I understand that. However; is it very possible for one side to 'grow' larger than the other if the fat placed in one side is from let's say, a more troublesome fatty area than the fat used on another side? Theoretically it has to be possible no? Additionally is this something PS know, thus, do they mix the fat up as to combine it all before injection?

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