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Hello, As I recall, there were some younger patients who did not suffer disastrous effects of overgrowth, and who did improve with the surgery. I might add that there still are people with leukemia who die a rather harsh death after an unsuccessful bone marrow transplant, though fewer of them then before. It needs saying that bone-marrow transplantation is not always successful; but it is not to say that fetal tissue transplantation doesn't have much more to do before it is equal to bone marrow transplants, which continued despite very low success rates. Also let's not forget that omni- or pluripotent stem-cell research has a lot more research to do to make up for the many more steps needed to turn those cells into ones that are neural cells (or whatever kind is desired). There is a big difference between fetal tissue, which is already differentiated into brain cells, hence, why they work so well or too well, and undifferentiated cells, as are stem cells. True? Please point out anything you feel is wrong with my understanding generally of the science. Respectfully yours, Charlotte Mancuso ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn