Fig. 2.

An 82-year-old man without vaccination, lung disease, or smoking history. A. Initial CT scan was performed six days after diagnosis. Well-defined ground glass opacities (GGOs) were extended in subpleural region, while central area was spared. Initial CT score and Pneumonia Score was 4. B. Follow-up CT at one month after diagnosis. The previously identified GGOs became denser consolidation with architectural distortion indicating fibrosis with indication of traction bronchiolectasis. C. Follow-up CT at ten months after diagnosis. GGO and consolidation have decreased. However, asymmetrical moderate to severe traction bronchiectasis/bronchiolectasis has developed in subpleural areas. Microcystic honeycombing was also suspected. D. Follow-up CT at 16 months after diagnosis. Subpleural GGO with progression of asymmetrical severe traction bronchiectasis/bronchiolectasis, consistent with fibrotic Co-LA. Co-LA, post-COVID-19 lung abnormalities; GGO, ground-glass opacity.