Lung-RADS classifies findings into categories ranging from 0 to 4X, with each category indicating the likelihood of malignancy and recommended follow-up actions. For instance:
- Lung-RADS 1: Negative—no nodules or definitely benign nodules. - Lung-RADS 2: Benign appearance or behavior—unlikely to be malignant. - Lung-RADS 3: Probably benign—3% chance of malignancy; follow-up LDCT in 6 months. - Lung-RADS 4A: Suspicious—5-15% chance of malignancy; follow-up LDCT in 3 months or PET/CT. - Lung-RADS 4B: More suspicious—>15% chance of malignancy; biopsy or PET/CT recommended. - Lung-RADS 4X: Highly suspicious—requires more aggressive diagnostic measures.
