# EU-TIRADS — European Thyroid Imaging Reporting and Data System

> European ultrasound risk stratification of thyroid nodules.

**Situação:** vigente · **Órgão:** Tireoide · **Órgão emissor:** European Thyroid Association · **Versão:** 2017 · **Ano:** 2017

## Procedência e vigência
- Família: léxico
- Tipo de lógica: flat
- Modalidade: US
- Fonte primária: Russ G, Bonnema SJ, Erdogan MF, et al.. European Thyroid Association Guidelines for Ultrasound Malignancy Risk Stratification of Thyroid Nodules: EU-TIRADS (2017) — https://doi.org/10.1159/000478927
- Última verificação: 2026-07-24
- Última checagem: 2026-08-12

## Categorias

| Código | Rótulo | Critérios | Conduta | Risco | Localizador | Verificado |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | EU-TIRADS 1, normal | Normal: no nodules present in the thyroid. | No fine-needle aspiration is indicated because category 1 means that no thyroid nodule is present to sample. | Not applicable (no nodule). | PMC5652895 (Russ et al., Eur Thyroid J 2017) Table 2 | ✓ |
| 2 | EU-TIRADS 2, benign | Benign: purely cystic nodule, or an entirely spongiform nodule. | FNA not indicated (except for therapeutic purposes). | Malignancy risk close to 0%. | PMC5652895 Benign Category section; Table 2 | ✓ |
| 3 | EU-TIRADS 3, low risk | Low risk: oval shape, smooth margins, isoechoic or hyperechoic, with no high-risk feature. | FNA if the nodule is larger than 20 mm. | Malignancy risk 2-4%. | PMC5652895 Low-Risk Category section; Table 2; Recommendation R3 | ✓ |
| 4 | EU-TIRADS 4, intermediate risk | Intermediate risk: oval shape, smooth margins, mildly hypoechoic, with no high-risk feature. | FNA if the nodule is larger than 15 mm. | Malignancy risk 6-17%. | PMC5652895 Intermediate-Risk Category section; Table 2; Recommendation R4 | ✓ |
| 5 | EU-TIRADS 5, high risk | High risk: nodule with at least one high-risk feature - non-oval (irregular) shape, irregular margins, microcalcifications, or marked hypoechogenicity. | FNA if the nodule is larger than 10 mm. | Malignancy risk 26-87%. | PMC5652895 High-Risk Category section; Table 2; Recommendation R5 | ✓ |

### Citações por categoria
- **1**: Russ G, Bonnema SJ, Erdogan MF, et al.. European Thyroid Association Guidelines for Ultrasound Malignancy Risk Stratification of Thyroid Nodules: EU-TIRADS (2017) — https://doi.org/10.1159/000478927 · PMC5652895 (Russ et al., Eur Thyroid J 2017) Table 2
- **2**: Russ G, Bonnema SJ, Erdogan MF, et al.. European Thyroid Association Guidelines for Ultrasound Malignancy Risk Stratification of Thyroid Nodules: EU-TIRADS (2017) — https://doi.org/10.1159/000478927 · PMC5652895 Benign Category section; Table 2
- **3**: Russ G, Bonnema SJ, Erdogan MF, et al.. European Thyroid Association Guidelines for Ultrasound Malignancy Risk Stratification of Thyroid Nodules: EU-TIRADS (2017) — https://doi.org/10.1159/000478927 · PMC5652895 Low-Risk Category section; Table 2; Recommendation R3
- **4**: Russ G, Bonnema SJ, Erdogan MF, et al.. European Thyroid Association Guidelines for Ultrasound Malignancy Risk Stratification of Thyroid Nodules: EU-TIRADS (2017) — https://doi.org/10.1159/000478927 · PMC5652895 Intermediate-Risk Category section; Table 2; Recommendation R4
- **5**: Russ G, Bonnema SJ, Erdogan MF, et al.. European Thyroid Association Guidelines for Ultrasound Malignancy Risk Stratification of Thyroid Nodules: EU-TIRADS (2017) — https://doi.org/10.1159/000478927 · PMC5652895 High-Risk Category section; Table 2; Recommendation R5

## Referências cruzadas
- _fronteira compartilhada_ → [TI-RADS — ACR Thyroid Imaging Reporting and Data System](https://radcommons.laudos.ai/systems/ti-rads-2017.md) — Both stratify thyroid nodule malignancy risk on ultrasound. Categories, point logic, and size thresholds differ between the European and American systems.

## Histórico de versões

| Data | Evento | Detalhe | Situação |
| --- | --- | --- | --- |
| 2017-09-01 | published | EU-TIRADS published by the European Thyroid Association. | confirmed |


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> Conteúdo de referência reescrito. Confira a publicação primária vigente. Não é dispositivo médico nem substitui o julgamento clínico. O radiologista responsável pelo laudo permanece o autor e o responsável.

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