UPDATE: Alex Trebek diagnosed with stage four pancreatic cancer

Alex Trebek has been diagnosed with stage four pancreatic cancer.

The Sudbury-born game-show host announced the news in a video posted on the ``Jeopardy!'' YouTube channel.

Trebek says he wanted to announce the news himself to prevent fans ``from reading or hearing some overblown or inaccurate reports.''

He acknowledges the prognosis for stage four pancreatic cancer ``is not very encouraging.''

But he adds that he's ``going to fight this'' and ``going to keep working.''

The 78-year-old says with love, support and prayers, he plans ``to beat the low survival rate statistics for this disease.''