Skip to main content Accessibility help
  • Print publication year: 2021
  • Online publication date: March 2021

8 - Fine-Needle Aspiration of Thyroid Gland


Palpable thyroid nodules are present in approximately 5–7% of the adult population, and of these, 5–10% harbor malignancy. Additional thyroid nodules are found incidentally on imaging for other medical reasons, including screening for malignancies of other organs or evaluation of vasculature. Ultrasound (US) imaging of the neck with evaluation of the thyroid and lymph nodes is typically used and recommended to characterize thyroid nodules. The American Thyroid Association (ATA) classification, and the Thyroid Imaging, Reporting, and Data System (TIRADS) of the American College of Radiology (ACR-TIRADS) risk stratification systems are commonly used.