Seen this? Islet cells transplanted to liver
http://pagingdrgupta.blogs.cnn.com/2009/12/15/landmark-trauma-surgery-was-a-collaborative-effort/
A rather interesting approach. Since they were able to harvest islet cells from his own damaged pancreas, they were able to transplant them into his liver and he presumably won’t have any rejection problems and won’t need immunosuppressent drugs.