| AHDS | Alan–Herndon–Dudley Syndrome |
| CH | Congenital Hypothyroidism |
| FT4 | Free Thyroxine |
| FT3 | Free Triiodothyronine |
| MCT8 | Transmembrane monocarboxylate transporter 8 |
| NBS | Newborn Screening |
| RTHα | Resistance to Thyroid Hormone alfa |
| RTHβ | Resistance to Thyroid Hormone beta |
| TRIAC | Triiodothyroacetic acid |
| TSH | Thyroid-Stimulating Hormone |
| TT4 | Total Thyroxine |
| T3 | Triiodothyronine |
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