Hi chris,
I did have some of the same type of swallowing issues as you discuss. I had had thyroid removed several years ago and just attributed it to that surgery as a muscle was involved in taking it out and Dr told me I might have some trouble till muscle "healed".. but after being diagnosed with the AN, now I see that it may have been the culprit also.. mine had extended out of the IAC into the CPA and was pressing on the brainstem and it was not really large size, about 2.8cm..The surgeon asked me after looking at the MRI he did right before surgery if I had experienced any swallowing problems as tumor was growing toward the nerve (11th?) associated with swallowing. I told him I had,, really similar to what you describe in that I would not choke per se but whatever I was eating would not "go down" on its own and it was VERY frightening! I literally had to tell myself to just relax and not panic in order for food to finally move on down.. I could not get food up or to move on down.. I believe it was a combination of location of AN and brainstem involvment, but that is just my interpretation of Dr info,, I am not a dr.... I would suggest you mention this to your Dr also as it may well be related .. try to determine from him the location of the tumor, , if it extends out of the IAC, auditory canal, it may be impacting more nerves.. just my two cents.. Jane