| 18F-FDG-PET | 18F fludeoxyglucose Positron Emission Tomography |
| ATA | American Thyroid Association |
| AUS/FLUS | Atypia or follicular lesion of undetermined significance |
| CT | Calsitonin |
| CNS | Central Nervous System |
| CT | Computed Tomography |
| DTC | Differentiated Thyroid Cancer |
| EANM | European Association of Nuclear Medicine |
| FNAB | Fine Needle Aspiration Biopsy |
| FN/SFN | Follicular/Hürthle neoplasm or suspicious for follicular/Hürthle neoplasm |
| GEC | Gene Expression Classifier |
| GLs | Guidelines |
| HT | Hashimoto Thyroiditis |
| MTC | Medullary Thyroid Cancer |
| MRI | Magnetic Resonance Imaging |
| MTC | Medullary thyroid carcinoma |
| MPUS | Multiparametric neck ultrasonography |
| MEN | multiple endocrine neoplasia |
| NCI | National Cancer Institute |
| NPV | Negative predictive value |
| PTC | Papillary thyroid cancer |
| PPV | Positive predictive value |
| RAIU | Radioiodine uptake |
| SWE | shear-wave elastography |
| SEER | Surveillance Epidemiology and End Results |
| SUSP | Suspicious for malignancy |
| TBSRTC | The Bethesda System for Reporting Thyroid Cytopathology |
| TC | Thyroid Cancer |
| Tg | Thyroglobulin |
| TFNAC | thyroid fine needle aspiration cytology |
| US | Ultrasound |
| WOInd | Wash-Out Index |
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