CN announced after market close on August 12, 2015 that company President and CEO Claude Mongeau will be taking medical leave to have a rare form of pre-cancerous tumor removed from his larynx, and that the removal of the tumour in late August/early September and one-month recovery will then be followed by about six weeks of preventative radiation therapy. CFO Luc Jobin will lead the CN executives during Mr. Mongeau's recovery.
