Aspects of the new classification of adenocarcinoma in relation to nodule type
| Term | Malignant potential | CT correlate |
|---|---|---|
| Atypical adenomatous hyperplasia (AAH) | Premalignant | pGGN <5 mm |
| Adenocarcinoma in situ (AIS) | Premalignant | pGGN >5 mm up to 30 mm |
| Minimally invasive adenocarcinoma (MIA) | Invasive | PSN, solid area <5 mm |
| Invasive adenocarcinoma | Invasive | Larger PSN or solid nodule |
pGGN, pure ground-glass nodule; PSN, part-solid nodule.