Correct!
5. 1 and 2

The focused thoracic CT images show numerous small cysts (arrowheads), some irregularly shaped and some tubular-shaped (curved arrow), the latter suggesting an airway etiology. The cysts are not thick-walled, stacked, and subpleural in morphology, as would be expected with honeycombing. A few centrilobular nodules are present (arrows), but the nodular pattern is not a miliary one. There is a conspicuous clustering of the abnormalities- both cysts and nodules- in the superior and posterior basal segments of the right lower lobe, consistent with a dependent distribution.

The patient subsequently underwent thoracic CT (Figure 4) for further characterization of the pulmonary abnormalities seen at presentation chest radiography (Figure 1A & B).

Figure 4.  Thoracic CT obtained at presentation, shortly after presentation chest radiography

Regarding the thoracic CT, which of the following statements is most accurate?

1. Comparison among the thoracic CTs shows multifocal, recurrent, and migratory nodules and cystic lesions
2. The thoracic CT shows worsening of interstitial thickening suggesting a progressive fibrotic abnormality
3. Comparison of the thoracic CTs shows serial progression of the cystic and cavitary process
4. The presentation thoracic CT shows findings suggesting development of a bronchopleural fistula

Home/Imaging