Amber Vairo has grown two inches and gained nearly a pound. The three tiny scars on her belly have all but vanished, along with any doubts she'll survive after complex robotic surgery to fix a life-threatening condition. Iowa doctors say last month Vairo became the smallest patient in the world to undergo robotic surgery of any kind. She was just five-point-six-pounds and six days old. Doctors at the University of Iowa Hospital and Clinics made three incisions, each no wider than the diameter of a ballpoint pen. Two provided a pathway for the robotic arms; the third for a pair of cameras providing a three-dimensional view. Vairo was born with a hole in her diaphragm which can be fatal because it allows the intestines to migrate into the chest, putting pressure on organs including the heart.