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Table 1 Summary of Lung-RADS category [9]

From: Impact of lung-RADS classification system on the accurate diagnosis of pulmonary nodular lesions in oncology patients

Category descriptor Category malignancy Probability management Recommendation
Negative 1 < 1% Continue annual screening with LDCT in 12 months
Benign appearance or behavior 2 < 1% Continue annual screening with LDCT in 12 months
Probably benign 3 1–2% 6-month LDCT
Suspicious 4A 5–15% 3-month LDCT; PET/CT may be used when there is a ≥ 8 mm solid component
4B
4X
> 15% Chest CT with/without contrast, PET/CT, and/or tissue sample that depends on the probability of malignancy and comorbidities. PET-CT may be used when there is a ≥ 8-mm solid component