Can we detect cancer earlier?

Silicon Valley research lab found a way to identify cancer cells in a drop of blood.

Source: http://thenextweb.com/insider/2013/05/19/what-the-future-looks-like-inside-the-lab-that-brought-us-siri-the-mouse-and-the-internet-itself/

Related links: http://www.kurzweilai.net/how-to-detect-microvesicles-in-the-bloodstream-to-diagnose-and-monitor-brain-cancer