Surgeons are taught from textbooks which conveniently color-code the types of tissues, but that's not what it looks like in real life -- until now. At TEDMED Quyen Nguyen demonstrates how a molecular marker can make tumors light up in neon green, showing surgeons exactly where to cut.img src="http://feeds.feedburner.com/~r/TEDTalks_video/~4/hr3DKG1JixE" height="1" width="1"/