Cancer Stem Cells Start Tumors In Mice Published: Nov 20, 2006 WASHINGTON (Reuters) - Stem cells -- the master cells that give rise to all the blood and tissue in the body -- may also be responsible for tumors, according to two separate studies published on Sunday. >>> Discuss This Story Related links Globe and Mail This will open in a new window Reuters This will open in a new window Email this Facebook Twitter LinkedIn Pinterest Reddit Back to news