Pseudo Nodules in Hashimotos

I was diagnosed with Hashimotos in 2007. It wasnt until 2009 that my thyroid was actually palpitated and the doctor thought she felt a small nodule. An ultrasound was performed in April of this year and the results came back normal but I do have hyperemeia of the right lobe. I recently visited her again because of continuing fatigue and she pulled up the actual ultrasound and pointed out a 'pseudo nodule' on the right lobe. She had spoken with a collegue of hers and they came to the conclusion that it was a pseudo nodule and that we will watch it over the next year or so. My question is, why would a fine needle aspiration not be performed to see whether or not it is a worry? How can they be so sure it is a pseudo nodule without doing a FNA on it? I would like to also note that she did palpitate it again recently and felt nothing, she said that the 'pseudo nodule' was well within my thyroid.