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CORRELATION BETWEEN TI-RADS, SIZE AND CYTOLOGY OF THYROID NODULES
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Abstract
Background: ACR-TIRADS released in 2017 helps to classify the risk of thyroid cancer based on the characteristics and size of the nodule on ultrasound to decide whether to do FNA for the patient. However, does thyroid nodule size correlate with malignancy. Obsject: To determine the risk of thyroid cancer when nodules classified as TI-RADS 3, 4, 5 with size as recommended and smaller than those by ACR-TIRADS 2017. Subjects – Methods: Thyroid nodules classified as TIRADS 3, 4 or 5 were divided into different sizes according to ACR-TIRADS 2017. Results: A total of 533 thyroid nodules from 416 patients met the study conditions. The risk of malignancies increased with higher TI-RADS classification (9% in TI-RADS 3, 12.8% in TI-RADS 4.5, and 55.4% in TI-RADS 5). With the cut-off point of TI-RADS 5, SEN, SPE, PPV, and NPV in thyroid cancer diagnosis were respectively 72.03%, 78.72%, 55.38%, 88.47%, (AUC=0.8). There is no correlation between the size and the risk of malignancy of the thyroid nodule on ultrasound. Conclusion: ACR-TIRADS 2107 is an easy-to-apply, highly accurate classification system for the classification of thyroid nodules based on ultrasound features to assess the risk of malignancy. The thyroid nodule's size does not appear to be a critical criterion for indication of FNA in nodules with high suspicion of malignancy on ultrasonography.
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Keywords
ACR- TIRADS 2017, kích thước nhân giáp trên siêu âm
References
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