A recent chest CT scan found a "1 cm right thyroid lobe nodule" It says that it can be followed with ultrasound if clinically warranted.
Looking back at past chest CT scan from 6 months ago, I found that it said Nodules within the thyroid gland that measure </= 10-mm in long axis."
1. Are these 2 scans referring to the same thing or is the recent finding new?
2. What does "</= 10mm in long axis mean"?
3. What does clinically warranted mean?
4. When should an ultrasound be done?
5. Should I be concerned?
Thank you in advance.