The Globe and Mail reports in its Tuesday, Sept. 1, edition that Canadian National Railway chief executive officer Claude Mongeau had surgery on Aug. 25 for a "precancerous" throat tumour. The Globe's Eric Atkins writes that chief financial officer Luc Jobin is taking the leadership role at CN in Mr. Mongeau's absence, which is expected to last three months. A CN spokesman described the operation as successful. Mr. Mongeau, 53, has a rare type of precancerous soft-tissue tumour located in the upper left part of his larynx, according to a news release from CN. He will need surgery and radiation therapy to prevent the tumour from recurring, the company said. "This is a serious health setback for me personally, but one of CN's core strengths is that we have a very experienced and tightly-knit senior team that knows how to lead our railway to success," Mr. Mongeau said in a statement.