My husband was diagnosed with cancer of the tonsils last summer with a T4 tumor. He went through chemo and radiation and all check ups were coming in good. Until yesterday.....there is some swelling in the area. The ENT doctor cannot see it but only feel it and wants to see him in a month. We got this news yesterday the same day that we were starting our vacation. He told us to enjoy our vacation but can't help to worry. Any ideas on this swelling?