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並前往https://www.mdanderson.org/cancerwise/canker-sore-vs--oral-cancer--how-can-you-tell-the-difference.h00-159542901.html

Canker sore vs. oral cancer: How can you tell the difference?

How do you know if a mouth ulcer is a form of oral cancer or a harmless canker sore? We checked in with Ann Gillenwater, M.D., ...

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