Lung-RADS 1 Interpretation
A Lung-RADS 1 classification means the low-dose CT scan is completely negative with no lung nodules or other abnormalities detected, and the patient should return for routine annual screening in 12 months. 1
What Lung-RADS 1 Indicates
- No nodules or masses are present on the screening CT scan 1, 2
- The lungs are entirely normal from a nodule detection standpoint 3
- This represents the lowest risk category in the Lung-RADS classification system 1
Recommended Management
- Return to annual screening in 12 months is the standard recommendation 1, 2
- No additional imaging, follow-up CT scans, or diagnostic workup is needed before the next scheduled annual screening 1
- The patient should continue to meet eligibility criteria for lung cancer screening (typically age 55-80 with ≥30 pack-year smoking history who currently smoke or quit within the last 15 years) 4
Clinical Context
The Lung-RADS v2022 system was designed to standardize reporting and reduce false-positive rates in lung cancer screening programs 1. The classification system ranges from Lung-RADS 0 (incomplete study) through Lung-RADS 4X (highly suspicious for malignancy), with Lung-RADS 1 representing the most reassuring finding 1, 2.
Important Considerations
- Lung-RADS 1 does not exclude other incidental findings unrelated to nodule detection (such as emphysema, coronary calcifications, or other thoracic abnormalities), but specifically indicates no concerning nodules are present 1
- The v2022 update maintained the same size thresholds for solid and subsolid nodules as previous versions but added clarifications for atypical cysts, juxtapleural nodules, and airway nodules 2, 5
- Patients with Lung-RADS 1 have the lowest risk of lung cancer among all screening participants 1