High resolution ultrasonography (USG) is used to evaluate thyroid nodules, with the Thyroid Imaging Reporting and Data System (TIRADS) providing risk classification that guides further testing like fine needle aspiration cytology (FNAC).
The study observed 137 euthyroid nodules, comparing USG findings and FNAC results to surgical biopsy outcomes, revealing that FNAC is more specific for diagnosing malignancy (90% specificity) compared to TIRADS.
Key features from USG, such as micro-calcifications, irregular margins, and shape, were identified as highly sensitive and specific indicators of malignancy, although some benign cases could still show suspicious USG features.