Ric.......not my field I'm afraid but it is more precises than you describe affecting mainly the "re-educating of stem cells.
These "stem cells" can be mixed with a "broth" in the test tube and made to grow into many organ cells, e.g liver etc and transplanted into the identical organ of the host. Seen in stem cells that have been taken from a human and transplanted into a kidney, heart or liver.
These educated stem cells can be taken from any part of the host, e.g skin or blood and guided to form the cells of any organ which can then be re-implanted in the host.
Sorry about my non-scientific language, but that ids how i see it, but i am sure that some ABer with more scientific knowledge will assist.