This undated image provided by Roche on Friday, Feb. 22, 2013 shows a vial and packaging for the drug Kadcyla. On Friday, Feb. 22, 2013, the U.S. Food and Drug Administration announced

 

              This undated image provided by Roche on Friday, Feb. 22, 2013 shows a vial and packaging for the drug Kadcyla. On Friday, Feb. 22, 2013, the U.S. Food and Drug Administration announced
This undated image provided by Roche on Friday, Feb. 22, 2013 shows a vial and packaging for the drug Kadcyla. On Friday, Feb. 22, 2013, the U.S. Food and Drug Administration announced the approval of the first-of-a-kind breast cancer medication that targets tumor cells while sparing healthy ones. (AP Photo/Roche)