What is radiation therapy? | OncoLink Cancer Resources

<InvalidTag language="JavaScript" type="text/javascript"> document.write('<a href="http://clk.atdmt.com/DEI/go/190407958/direct/01/" target="_blank"><img src="http://view.atdmt.com/DEI/view/190407958/direct/01/"/></a>'); </script><noscript><a href="http://clk.atdmt.com/DEI/go/190407958/direct/01/" target="_blank"><img border="0" src="http://view.atdmt.com/DEI/view/190407958/direct/01/" /></a></noscript>