CAMBRIDGE, Mass.--(BUSINESS WIRE)--Verastem, Inc., (NASDAQ: VSTM) a biopharmaceutical company focused on discovering and developing drugs to treat breast and other cancers by targeting cancer stem cells, announced the appointment of S. Louise Phanstiel to its Board of Directors. Louise Phanstiel was most recently the President of Specialty Products at WellPoint, Inc. and currently serves on the Board of Directors of Myriad Genetics and Cedar Sinai Health System.