Also in November, a major medical breakthrough in Spain was made when a woman received the world's first tailor-made trachea transplant using her own stem cells. Thirty-year-old Claudia Castillo had a collapsed lung from battling tuberculosis. At first, doctors wanted to remove the entire lung, but they figured out a way to save the organ by replacing part of the windpipe. By using her own stem cells, doctors dramatically cut the chance of her body rejecting the transplant. "This technique has great promise," said Dr. Eric Genden, who did a similar transplant in 2005 at Mount Sinai Hospital in New York. If successful, the procedure could become a new standard of treatment, said Genden.