If left untreated as it is located directly above the roof of the mouth and upper gums I sure would say it is a possibility as well as the eye's and ears. It could spread very easily. I had a similar situation and that is what happened to me. The presence of the cyst I would also associate with the infection and restate your comment as having the cyst which are the infection were present you just were not aware of the issue until the cyst were discovered.