Michelle this is your body. You dictate to the doctors what you want done. You need peace of mind to what the "thing" is. This is what we pay for. I was advised by my ENT that a brush biopsy doesnt get enough tissue/cells. It can give you a false negative. My dentist did a brush after a year of him watching it, which was negative. Im still waiting on the tissue results that my ENT did.If you still dont feel comfortable with the answers you get after the brush, if you do it. Go for a 2nd opinion. Dont be afraid to tell them how you feel. Good Luck!