Tuesday, September 06, 2005

Embryonic Stem Cells Found to Acquire Mutations
Abnormalities Could Produce Tumors; Scientists Say Evidence May Point to Need for Fresh Colonies
By Rick Weiss
Washington Post Staff Writer
Monday, September 5, 2005

Human embryonic stem cells, treasured by researchers because of their potential to help rejuvenate ailing organs, do not remain as ageless and perpetually unblemished as scientists once thought, according to a new research report.

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