Successful pig-to-human kidney transplants are raising hope among some in the medical community who think the treatment could be a game changer for people living with kidney disease but some are skeptical of the treatment's value.

Chinese researchers are reporting new steps in the quest for animal-to-human organ transplants – with a successful pig kidney transplant and a hint Wednesday that pig livers might eventually be useful,

Doctors in China have become the first to report details about a transplant of a genetically modified pig liver into a human.