INTRODUCTIONUltrasonography has been recognized as the main tool in selecting thyroid nodules for fine‐needle aspiration cytology (FNAC). Several studies have reported various specific features by ultrasound and color flow Doppler that are suggestive of malignancy (ie, hypoechogenicity, blurred margins, microcalcifications, taller than wide shape, and intranodular vascular signals). More recently, elastography has been proposed to improve the accuracy of ultrasound and color flow Doppler. In the last years, several international thyroid societies have proposed different ultrasound risk stratification systems, with the aim of providing an easy‐to‐use tool for clinical thyroidologists. In particular, the ultrasound risk stratification system by the American Thyroid Association (ATA) has given consensus and began the most popular one. This system proposes a classification of lesions based on echostructure, echogenicity, margins, presence/absence of microcalcifications, and shape. The use of further ultrasound parameters, such as color flow Doppler and elastography are discouraged by the ATA. A 5‐class scoring is recommended by the ATA experts, and a risk for malignancy is estimated to each category: <1% for benign class; <3% for very‐low suspicion; 5%‐10% for low suspicion; 10%‐20% for intermediate suspicion; and >70%‐90% for high suspicion.Cytologic examination of FNAC specimens is a pivotal tool to detect or exclude
Head & Neck: Journal for the Sciences & Specialties of the Head and Neck – Wiley
Published: Jan 1, 2018
Keywords: ; ; ; ;
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