Stem cells might cause brain tumors, study finds
WASHINGTON (Reuters) - Injecting human embryonic stem cells into the brains of Parkinson's disease patients may cause tumors to form, U.S. researchers reported on Sunday.
Steven Goldman and colleagues at the University of Rochester Medical Center in New York said human stem cells injected into rat brains turned into cells that looked like early tumors.
Writing in the journal Nature Medicine, the researchers said the transplants clearly helped the rats, but some of the cells started growing in a way that could eventually lead to a tumor.[snip]
Link: http://today.reuters.com/news/articlenews.aspx?type=healthNews&storyID=2006-10-22T192559Z_01_N22437291_RTRUKOC_0_US-STEMCELLS.xml&WTmodLoc=HealthNewsHome_C2_healthNews-1