Hi, everyone, a good news about cancers from ScienceNOW Daily News:
http://sciencenow.sciencemag.org/cgi/content/full/2009/902/1?etoc

the relevant paper:
http://www.sciencemag.org/cgi/content/abstract/sci;1179386v1

Smoothened Mutation Confers Resistance to a Hedgehog Pathway Inhibitor in Medulloblastoma