الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
 |  | from | 140 |  |  |
| | | from | 140 | | |
Abstract
Thyroid nodules are a frequent finding on neck sonography. Ultrasound is the most commonly used imaging technique for the evaluation of thyroid nodules.
The Thyroid Imaging, Reporting and Data System (TI-RADS) developed by the American college of radiology (ACR) for classification of thyroid nodules is a practical and convenient method for risk stratification of thyroid malignancy, based on allocating points for different sonographic features of thyroid nodules in five morphologic categories (composition, echogenicity, margins, shape and presence of echogenic foci).
The following sonographic features showed a significant association with malignancy in this study: solid composition, marked hypoechogenicity, taller-than-wide shape, lobulated or irregular margins, extrathyroidal extension and presence of echogenic foci. According to ACR TI-RADS scoring system, each of the previous suspicious features are assigned 2 or 3 points, raising the total points given and therefore raising the risk of malignancy.
The correct interpretation of thyroid ultrasound report using the TI-RADS criteria helps to facilitate the identification of highly suspicious nodules.
It is relatively easy to use TI-RADS scoring system. A major benefit of its use is that every nodule can be categorized. Also, the diagnostic approach to thyroid nodules will be standardized as regards the terminology and management of thyroid nodules according to their risk of malignancy.
The aggregate risk of malignancy increased as the TIRADS level increased from TR 1 to TR 5 (P-value < 0.001).
In summary, the ACR TI-RADS scoring system is a simple and practical method for assessing thyroid nodules and has shown an excellent diagnostic accuracy for the diagnosis of malignant thyroid nodules in the present study.