If you have oral cancer, the most likely place for it to spread is the throat. The mouth is connected to the throat, and cancer cells in the mouth grow very quickly. These cancer cells also have a high tendency to spread. If left unchecked over time, there is a possibility that they will spread throughout the body. Moreover, since the mouth and throat are so close to each other, the throat is the most likely first place to be affected. If a patient discovers they have oral cancer, they should seek treatment as soon as possible to prevent the condition from spreading.