pulmonary nodule
A round or oval-shaped opacity in the lung up to 3 cm in diameter, requiring evaluation for malignancy.
Full Definition
A pulmonary nodule is defined as a round or oval-shaped opacity in the lung parenchyma that measures up to 3 cm in diameter and is surrounded by aerated lung tissue. Lesions larger than 3 cm are classified as masses and have higher probability of malignancy. Pulmonary nodules are commonly detected on chest imaging and require systematic evaluation to determine malignant potential. Factors influencing cancer risk include size, morphology (solid vs. ground-glass vs. part-solid), growth rate, patient age, smoking history, and family history of cancer. Management follows established guidelines incorporating risk stratification, with options including surveillance imaging, PET-CT scanning, biopsy, or surgical resection based on individual risk assessment and patient factors.
Usage
Usage note: Distinguish from mass (>3 cm); specify characteristics like solid vs. ground-glass when relevant.
In Context
- "A 12mm solid pulmonary nodule was identified in the right upper lobe on screening CT." — Radiology report
- "The pulmonary nodule showed interval growth from 8mm to 14mm over 12 months, concerning for malignancy." — Follow-up note