Bloomberg -- A 10-year-old girl with a deadly blood clot underwent a life-saving surgery that showed the power of using stem cells to regenerate healthy organs. The girl developed a clot in the blood vessel between her intestine and liver during her first year of life, creating the risk of potentially fatal bleeding. Michael Olausson, a surgeon at Sahlgrenska University Hospital at the University of Gothenburg took a blood vessel from a donor, chemically removed tissue and DNA from it, then seeded stem cells from the girl’s bone marrow to create a healthy, living blood vessel.