Hi Brian:

I'm not sure about a "brush" biopsy, but when I first had a small swollen place under my neck biopsied, they did a "needle" biopsy, which came back NEGATIVE. It wasn't until they actually took my tonsils out, at my insistence, that they discovered squamous-cell cancer under right tonsil. So, if it's possible to have a surgical biopsy, I'd go for it. If not, you'll always have doubts - I did, which is why I insisted my tonsils be removed. I wish you all the luck possible and pray you're biopsy will be nagative.
julieann