In North Carolina, scientists study how to build on the internal scaffolding of hearts, lungs, livers and kidneys of people and pigs to make custom-made implants using 3-D printer .
Here's the dream scenario: A patient donates cells, either from a biopsy or maybe just a blood draw. A lab uses them, or cells made from them, to seed onto a scaffold that's shaped like the organ he needs. Then, says Dr. Harald Ott of Massachusetts General Hospital, "we can regenerate an organ that will not be rejected (and can be) grown on demand and transplanted surgically, similar to a donor organ."
Read more about experimental organ growing in laboratories