Here are a few photos to show the level of intrusion required for this procedure. The "post-op" shots were taken about 24 hours after the procedure at the first bandage change. Other photos taken as dated.
Site from which stem cells (bone marrow) were drawn.

And the site where the fat cells were taken.

The knee before the procedure.

And the knee the next day. Note the swelling due to the injection.

Day 5
The only site that showed itself worse for wear at anytime after - the site for fat cell extraction (about 5 days post-op).
Day_18
The knee 18 days post-op