CTICasesInvasive Pulmonary Adenocarcinoma
Imaging findings
Thin-section chest CT reveals a classic part-solid nodule in the right lung with a ground-glass halo and a solid central component. Over a one-year follow-up period, the nodule demonstrates a subtle increase in overall size, progressive consolidation of the solid component, a tiny notch or indentation, and focal retraction of the adjacent major fissure. Pathological examination confirmed invasive adenocarcinoma.
Key takeaways
Important CT features of primary lung adenocarcinoma include a part-solid appearance, lobulation, focal notches, and a 'pleural tail' or fissure retraction. Fissure retraction and pleural tails represent localized fibrous tethering created by the tumor, which stimulates fibroblasts to lay down collagen bands that the adenocarcinoma uses as scaffolding to invade adjacent structures.
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