| US | ultrasonography |
| FNA | fine-needle aspiration |
| US-FNA | ultrasound–guided fine-needle aspiration |
| USE | elastosonography |
| MEN-2 | multiple endocrine neoplasia Type 2 |
| TIRADS | thyroid imaging reporting and data systems |
| ATA | American Thyroid Association |
| ETA | European Thyroid Association |
| K-TIRADS | Korean Society of Thyroid Radiology |
| EE | extrathyroidal extension |
| AACE-AME | American Association of Clinical Endocrinologists, American College of Endocrinology, and Associazione Medici Endocrinologi Medical |
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