Lung-RADS · Tórax

Lung-RADS Lung CT Screening Reporting and Data System

vigente

Structured assessment categories and management for low dose CT lung cancer screening.

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Escala de categorias

0 1 2 3 4A 4B 4X

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Procedência e vigência

Órgão emissor: American College of Radiology
Versão: v2022
Ano: 2022
Família: léxico
Tipo de lógica: flat
Modalidade: CT
Fonte primária: Lung CT Screening Reporting and Data System (Lung-RADS) version 2022
Última verificação: 2026-06-22
Última checagem: 2026-06-22

Lógica de decisão

Forma estruturada (flat). Uma futura calculadora a lê; as categorias abaixo são a superfície legível.

Size and attenuation derivation table pending sourcing.

Mostrar a lógica estruturada (JSON)

{
  "categories": [
    "0",
    "1",
    "2",
    "3",
    "4A",
    "4B",
    "4X"
  ]
}

Categorias num relance

Cat.	Significado	Conduta	Risco	Fonte
0	Incomplete Incomplete: a prior chest CT is being located for comparison, part or all of the lungs cannot be evaluated, or findings suggest an inflammatory/infectious process.	Obtain comparison with prior chest CT and/or additional lung-cancer-screening CT; for suspected infection/inflammation, 1-3 month LDCT.	Published estimated population prevalence ~1% (this is a prevalence figure, not a probability of malignancy).	okfonte Lung-RADS v2022 assessment categories table, Category 0 row
1	Negative Negative: no lung nodules, or nodules with definitely benign features (complete/central/popcorn/concentric-ring calcification, or fat-containing).	Continue annual screening with 12-month LDCT.	Published estimated population prevalence 39% (this is a prevalence figure, not a probability of malignancy).	okfonte Lung-RADS v2022 assessment categories table, Category 1 row
2	Benign appearance or behavior Benign by imaging features or indolent behavior. Includes: juxtapleural nodule under 10 mm with benign morphology; solid nodule under 6 mm at baseline or new under 4 mm; part-solid nodule with total mean diameter under 6 mm at baseline; non-solid (ground-glass) nodule under 30 mm at baseline/new/growing, or >=30 mm if stable/slowly growing; subsegmental airway nodule.	Continue annual screening with 12-month LDCT.	Published estimated population prevalence 45% (this is a prevalence figure, not a probability of malignancy).	okfonte Lung-RADS v2022 assessment categories table, Category 2 row
3	Probably benign Probably benign. Includes: solid nodule 6 to under 8 mm at baseline (or new 4 to under 6 mm); part-solid nodule with total mean diameter >=6 mm and solid component under 6 mm at baseline (or new under 6 mm total); non-solid (ground-glass) nodule >=30 mm at baseline or new; thick-walled atypical cyst with a growing cystic component.	Short-interval follow-up: 6-month LDCT.	Published estimated population prevalence 9% (this is a prevalence figure, not a probability of malignancy).	okfonte Lung-RADS v2022 assessment categories table, Category 3 row
4A	Suspicious Suspicious. Includes: solid nodule 8 to under 15 mm at baseline (or growing under 8 mm, or new 6 to under 8 mm); part-solid nodule with total mean diameter >=6 mm and solid component 6 to under 8 mm at baseline (or new/growing solid component under 4 mm); segmental or more proximal airway nodule at baseline; certain atypical pulmonary cysts (thick-walled, or multilocular at baseline, or one becoming multilocular).	3-month LDCT; PET/CT may be considered when there is a solid nodule or solid component of 8 mm or larger.	Published estimated population prevalence 4% (this is a prevalence figure, not a probability of malignancy).	okfonte Lung-RADS v2022 assessment categories table, Category 4A row
4B	Very suspicious Very suspicious. Includes: solid nodule >=15 mm at baseline (or new/growing >=8 mm); part-solid nodule with solid component >=8 mm at baseline (or new/growing solid component >=4 mm); certain growing/atypical cysts; slow-growing solid or part-solid nodule that demonstrates growth over multiple screening exams; segmental or more proximal airway nodule that is stable or growing.	Diagnostic chest CT with or without contrast; PET/CT may be considered when there is a solid nodule or solid component >=8 mm; tissue sampling and/or referral for further clinical evaluation. Management depends on clinical evaluation, patient preference, and probability of malignancy.	Published estimated population prevalence 2% (this is a prevalence figure, not a probability of malignancy).	okfonte Lung-RADS v2022 assessment categories table, Category 4B row
4X	Very suspicious with additional features Category 3 or 4 nodules that carry additional features or imaging findings increasing suspicion for lung cancer (e.g., spiculation, lymphadenopathy, frank metastatic disease, a ground-glass nodule that doubles in size within a year).	Referral for further clinical evaluation (managed as a very-suspicious finding).	Published estimated population prevalence under 1% (this is a prevalence figure, not a probability of malignancy).	okfonte Lung-RADS v2022 assessment categories table, Category 4X row

Referências cruzadas

fronteira compartilhadaBI-RADS. Breast Imaging Reporting and Data System, 5th editionShares the ACR Reporting and Data System framework that BI-RADS established.

fronteira compartilhadaFleischner. Fleischner Society 2017 pulmonary nodule guidelinesBoth address pulmonary nodules on CT. Lung-RADS governs screening, Fleischner governs incidental nodules.

Histórico de versões

Data	Evento	Detalhe	Situação
2022-11-01	revised	Lung-RADS v2022 released, updating v1.1 (2019). evidência	confirmado

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