Rigel Pharmaceuticals, Inc. announced that it has appointed Alison L. Hannah, M.D. to its Board of Directors. Dr. Hannah brings over three decades of pharmaceutical industry experience to Rigel, including a deep knowledge of clinical development strategy in hematology and oncology with a focus on molecularly targeted therapies. Alison L. Hannah, M.D. currently serves as Chief Medical Officer for CytomX Therapeutics. Prior to joining CytomX, Dr. Hannah served as a consultant to nearly 30 pharmaceutical and biotechnology companies directing the development of investigational cancer therapies.