I think Chavez is in the denial stage. Below is an excerpt of an interview about Jobs the CEO of Apple Computers and world leader of Technology. Similar.

"I think that he kind of felt that if you ignore something, if you don't want something to exist, you can have magical thinking...we talked about this a lot," he tells Kroft. "He wanted to talk about it, how he regretted it....I think he felt he should have been operated on sooner."

He finally had the surgery and told his employees about it, but played down the seriousness of his condition. Isaacson says he was receiving cancer treatments in secret even though he was telling everyone he was cured.