Correct!
3. The thoracic CT shows the presence of bilateral thin-walled cysts, some with nodular components
The thoracic CT shows multiple, somewhat clustered, largely thin-walled cysts, although some of the cysts show peripheral nodular components (arrows). Some confluent opacity is present within the right perihilar region, but no overt consolidation is present. While cysts and nodules are present in combination on both the thoracic CT and the presentation chest radiographs, the thoracic CT is dominated by cystic change, whereas the follow up chest radiograph obtained at presentation is dominated by masses; therefore, the progression between these two studies is more suggestive of cysts developing into nodules and masses, and not the reverse, as suggested by choice “5”. Similarly, the nodular abnormalities are increasingly prominent on the follow up chest radiograph obtained at presentation compared with the thoracic CT, so choice “2” is not the best among the available choices. No features to indicate fibrotic lung disease are present.).
Several focused images from a thoracic CT scan (Figure 3) performed 4 years prior to the presentation chest radiograph (Figures 1A & B) were obtained.
Figure 3. Thoracic CT 4 years prior to presentation
Which of the following statements regarding this CT examination is most accurate?