Surgeons in Sweden have performed the world's first synthetic organ transplant.
The 36-year-old native of Eritrea who underwent the surgery is now recovering at a hospital in Iceland.
Scientists in London made an artificial windpipe for him coated in his own stem cells.
The technique doesn't need a donor, so there's no risk of the organ being rejected.
The graduate student in geology at the University of Iceland said he was sceptical about the operation but decided to go ahead after extensive talks with doctors, family, and friends.
He has family in Eritrea that includes a three-month-old son, whom he has yet to meet.
In 2009, he was diagnosed with cancer in his trachea shortly after arriving in iceland.
The cancer reappeared in 2010 after treatment, and doctors told him there was little hope of survival.
However, his doctor found a researcher at the Karolinska University Hospital in Sweden who had done experiments with a synthetic wind pipe.