Well, it still seems like an immune reaction and not
cancer. Having an enlarged node pop up in the remote site (
throat) is troubling, but then if it grew very quickly, that seems less like cancer and more like immune reaction.
This might be one of those mystery conditions, so don't get too discouraged if a diagnosis doesn't come quickly.
In the U.S. patients have a right to copies of their records, If that is the same there, you should get the pathology report.