Hyper-Echoic Rim in Thyroid Nodules: A New Ultrasonographic Feature for Malignancy Prediction

Area of Science:

• Radiology
• Oncology
• Pathology

Background:

• Thyroid nodules are common, and distinguishing between benign and malignant types is crucial.
• Ultrasound is a primary imaging modality for evaluating thyroid nodules.
• Hyper-echoic rims are an ultrasound feature that may correlate with malignancy.

Purpose of the Study:

• To verify the ultrasound characteristics of hyper-echoic rims in thyroid nodules.
• To assess the diagnostic value of hyper-echoic rims in predicting thyroid malignancies.

Main Methods:

• Retrospective analysis of 228 pathologically confirmed thyroid nodules (137 malignant, 91 benign).
• Evaluation of ultrasound features, specifically the presence of a hyper-echoic rim.
• Correlation of ultrasound findings with histological examination, focusing on boundary zone characteristics.

Main Results:

• A hyper-echoic rim was identified in 48 thyroid nodules.
• The presence of a hyper-echoic rim demonstrated high specificity (94.51%) but low sensitivity (31.39%) for malignancy.
• Histological examination revealed that 37 of 43 malignant nodules had boundary zones with mixed structures.

Conclusions:

• The hyper-echoic rim is a specific ultrasound finding associated with thyroid malignancy.
• This feature can serve as an additional parameter for the diagnosis of thyroid lesions.
• Further research may explore combining this feature with others for improved diagnostic accuracy.