Cancer Stem Cells May Be Responsible For Tumor Growth
http://www.medicalnewstoday.com/articles/248537.php
A very interesting concept and one that, if proven to be true, basically means that all our efforts in the last 40+ years to combat cancer have been totally wasted.
I will be keeping my eye on this development, though I expect that even if it were proved to the satisfaction of the majority of researchers we are still an easy decade away from relevant treatments.