Stefany,
I am far from an expert, but I recently got a second opinion from MD Anderson in Houston, Texas, and am currently under their care. I have been nothing but impressed. I would with utmost haste, schedule an appointment for your mother. The Head and Neck Center number is 713-792-6520. They have capabilities some other places do not have. Dr. Weber is the Center head, ask for him. He's great.
Best regards,
John