Source: The New York Times
Date: February 21, 2006
By NICHOLAS WADE
Correction Appended
Stem cells are the source of at least some, and perhaps all, cancers. At the heart of every tumor, some researchers believe, lie a handful of aberrant stem cells that maintain the malignant tissue. The idea, if right, could explain why tumors often regenerate even after being almost destroyed by anticancer drugs.
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