[Lani]

when we all started out as an egg which was penetrated by a sperm whose nuclear chromosomes mixed with the egg's and one cell divided into two, and then into four and so on, all cells started out without specialization and gradually got more and more specialized. Similar, normal stem cells lie in reserve in tissues to become more specialized and replace specialized cells as they need it.

What we didn't know is that these specialized cells can later de-differentiate ie, de-specialize and become a cell that can become lots of other things again.

Since it is not a one-way street, killing only the cancer stem cells may not prevent cancer from returning IF there is a way for differentiated cells to return to being cancer stem cells. We do not know if this is true yet, but it is concerning.

It comes from the lab of probably THE MOST RESPECTED cancer researcher in the world, Robert Weinberg(from what I ascertain from all the meetings I attend--he is spoken of with reverence), so it bears watching.