(CNN) After months of battling pancreatic cancer, Alex Trebek is hinting that his long tenure as host of "Jeopardy!" may be nearing an end.

Trebek told CTV he has begun to get sores inside his mouth from the chemotherapy, which makes it difficult to enunciate. He sometimes hears himself slurring his words on the quiz show, he said.

"I will keep doing it (the show) as long as my skills do not diminish, and they have started to diminish," he told CTV's Lisa LaFlamme in an interview Friday.

As "Jeopardy!" host, Trebek has graced millions of living rooms for 35 years and more than 8,000 episodes -- the most by a presenter of any single TV game show.

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