Diagnostic Performance of Multiple Sound Touch Elastography for Differentiating Benign and Malignant Thyroid Nodules

Area of Science:

• Medical Imaging
• Oncology
• Ultrasound Technology

Background:

• Distinguishing malignant from benign thyroid nodules is crucial for appropriate patient management.
• Traditional ultrasound methods can have limitations in accurately characterizing nodule malignancy.
• Stiffness quantification using elastography offers a novel approach to improve diagnostic accuracy.

Purpose of the Study:

• To evaluate the efficacy of Sound Touch Elastography (STE) in differentiating malignant (thyroid papillary carcinoma) from benign thyroid nodules.
• To assess the diagnostic performance of stiffness parameters, including elastic ratio (EI) and shear modulus (G), in thyroid nodule characterization.

Main Methods:

• Eighty-six patients with 86 thyroid nodules underwent STE examination.
• Tumor stiffness was quantified using elastic ratio (EI) and shear modulus (G) parameters.
• Statistical analysis, including ROC curve analysis, was performed to determine diagnostic accuracy.

Main Results:

• Mean EI was significantly lower in malignant nodules compared to benign ones (AUROC 80%).
• Shear modulus parameters (Gmax, Gmean, Gsd) were significantly higher in malignant nodules.
• Gmax demonstrated the highest diagnostic performance (AUROC 84%) with specific cutoff values and sensitivity/specificity.

Conclusions:

• Sound Touch Elastography (STE) shows significant potential as a non-invasive ultrasound diagnostic tool for thyroid nodules.
• Quantitative stiffness measurements, particularly Gmax, can aid in distinguishing malignant from benign thyroid lesions.
• STE represents a promising advancement in ultrasound-based thyroid nodule evaluation.