Two types of breast cancer stem cells identified; both necessary to create metastasis
 

Breast cancer stem cells exist in two different states and each state plays a role in how cancer spreads, according to an international collaboration of researchers. Their finding sheds new light on the process that makes cancer a deadly disease."The lethal part of cancer is its metastasis so understanding how metastasis occurs is critical," says senior study author Max S. Wicha, M.D.

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