# K-TIRADS — Korean Thyroid Imaging Reporting and Data System

> Korean ultrasound risk stratification of thyroid nodules.

**Situação:** vigente · **Órgão:** Tireoide · **Órgão emissor:** Korean Society of Thyroid Radiology · **Versão:** 2016 · **Ano:** 2016

## Procedência e vigência
- Família: léxico
- Tipo de lógica: flat
- Modalidade: US
- Fonte primária: Shin JH, Baek JH, Chung J, et al.. Korean Thyroid Imaging Reporting and Data System (K-TIRADS) (2016) — https://doi.org/10.3348/kjr.2016.17.3.370
- Última verificação: 2026-07-24
- Última checagem: 2026-07-24

## Categorias

| Código | Rótulo | Critérios | Conduta | Risco | Localizador | Verificado |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | K-TIRADS 1, no nodule | No nodule: the thyroid contains no discrete nodule on ultrasound. | Not applicable (no nodule to sample). | Malignancy risk is not applicable because no discrete thyroid nodule is present to stratify. | PMC4842857 (Shin et al., Korean J Radiol 2016;17(3):370) Table 2, category labelled 'no nodule' | ✓ |
| 2 | K-TIRADS 2, benign | Benign: spongiform nodule, partially cystic nodule with a comet-tail artifact, or a pure (simple) cyst. | Diagnostic FNA may be considered selectively when the nodule is 2 cm or larger; otherwise FNA is not indicated. | Estimated malignancy risk under about 3% (under roughly 1% for an isoechoic spongiform nodule). | PMC4842857 Table 2 (benign category) and Indications/Management text | ✓ |
| 3 | K-TIRADS 3, low suspicion | Low suspicion: a partially cystic or iso-/hyperechoic nodule that lacks all three suspicious ultrasound features (microcalcification, non-parallel/taller-than-wide orientation, spiculated or microlobulated margin). | FNA recommended when the nodule is 1.5 cm or larger. | Estimated malignancy risk approximately 3-15%. | PMC4842857 Table 2 (low-suspicion category) and Indications text | ✓ |
| 4 | K-TIRADS 4, intermediate suspicion | Intermediate suspicion: a solid hypoechoic nodule without any suspicious feature, or a partially cystic / iso- or hyperechoic nodule that has any one of the three suspicious ultrasound features. | FNA recommended when the nodule is 1 cm or larger. | Estimated malignancy risk approximately 15-50%. | PMC4842857 Table 2 (intermediate-suspicion category) and Indications text | ✓ |
| 5 | K-TIRADS 5, high suspicion | High suspicion: a solid hypoechoic nodule that has any of the three suspicious ultrasound features (microcalcification, non-parallel/taller-than-wide orientation, or spiculated/microlobulated margin). | FNA recommended when the nodule is 1 cm or larger; selective FNA may be considered above 0.5 cm. | Estimated malignancy risk above about 60%. | PMC4842857 Table 2 (high-suspicion category) and Indications text | ✓ |

### Citações por categoria
- **1**: Shin JH, Baek JH, Chung J, et al.. Korean Thyroid Imaging Reporting and Data System (K-TIRADS) (2016) — https://doi.org/10.3348/kjr.2016.17.3.370 · PMC4842857 (Shin et al., Korean J Radiol 2016;17(3):370) Table 2, category labelled 'no nodule'
- **2**: Shin JH, Baek JH, Chung J, et al.. Korean Thyroid Imaging Reporting and Data System (K-TIRADS) (2016) — https://doi.org/10.3348/kjr.2016.17.3.370 · PMC4842857 Table 2 (benign category) and Indications/Management text
- **3**: Shin JH, Baek JH, Chung J, et al.. Korean Thyroid Imaging Reporting and Data System (K-TIRADS) (2016) — https://doi.org/10.3348/kjr.2016.17.3.370 · PMC4842857 Table 2 (low-suspicion category) and Indications text
- **4**: Shin JH, Baek JH, Chung J, et al.. Korean Thyroid Imaging Reporting and Data System (K-TIRADS) (2016) — https://doi.org/10.3348/kjr.2016.17.3.370 · PMC4842857 Table 2 (intermediate-suspicion category) and Indications text
- **5**: Shin JH, Baek JH, Chung J, et al.. Korean Thyroid Imaging Reporting and Data System (K-TIRADS) (2016) — https://doi.org/10.3348/kjr.2016.17.3.370 · PMC4842857 Table 2 (high-suspicion category) and Indications text

## Referências cruzadas
- _fronteira compartilhada_ → [EU-TIRADS — European Thyroid Imaging Reporting and Data System](https://radcommons.laudos.ai/systems/eu-tirads.md) — Another regional thyroid ultrasound risk system; categories and FNA thresholds differ.
- _fronteira compartilhada_ → [TI-RADS — ACR Thyroid Imaging Reporting and Data System](https://radcommons.laudos.ai/systems/ti-rads-2017.md) — Korean alternative to ACR TI-RADS for thyroid nodule risk stratification, with different thresholds.

## Histórico de versões

| Data | Evento | Detalhe | Situação |
| --- | --- | --- | --- |
| 2016-05-01 | published | K-TIRADS published in the Korean Journal of Radiology. | 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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