| CASTLE | Carcinoma showing thymus-like differentiation |
| US | Ultrasound |
| TSH | Thyroid-stimulating hormone |
| FT4 | Free-thyroxine-4 |
| TG | Thyroglobulin |
| ATPO | Antithyroid peroxidase antibodies |
| TTF1 | Thyroid transcription factor-1 |
| P63 | Tumor protein |
| CK19 | Cytokeratin 19 |
| CKAE1/AE3 | Cytokeratin |
| HMWCK | High molecular weight keratin |
| CEA | Carcinoembryonic antigen |
| CT | Computed tomography scan |
| FNAC | Fine needle aspiration cytology |
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