In the last ten years, the number of patients needing organ donations has more than doubled, yet the number of organ transplants has not proportionately increased. Every day patients die waiting for an organ donation. Dr. Anthony Atala asks the question,"Can we grow the organs instead of transplanting them?"
See a 3D printer output a human kidney. Meet Luke, a patient with an engineered bladder, healthy and well, ten years later. http://www.ted.com/talks/anthony_atala_printing_a_human_kidney.html