Over 20,000 tummy tucks, 2,800 buttock lifts, 6,300 upper arm lifts, 5,600 thigh lifts, and 16,000 breast lifts were performed in 2009 specifically for body contouring after massive weight loss. Re-contouring the trunk through procedures like abdominoplasty is a key step in body contouring after massive weight loss, which has major differences compared to the same procedures in other patients. An abdominoplasty involves tightening the rectus muscles, removing excess skin and fat from the abdomen, and results in a scar that is hidden by underwear.