Papworth Hospital says shortage of donors mean they must use imperfect organs . 49 percent of 31 lung donors in the U.S. were smokers . Those time constraints mean medics have to make quick judgments about the suitability of donated organs , even if it that means using imperfect organs . UK data suggest one in 5,000 donated organs may have a tumor . Organs are thoroughly tested for suitability before transplant , says surgeon .
Papworth Hospital says shortage of donors mean they must use imperfect organs . 49 percent of 31 lung donors in the U.S. were smokers . UK data suggest one in 5,000 donated organs may have a tumor . Organs are thoroughly tested for suitability before transplant , says surgeon .