Correct!

5. The chest radiographic findings present previously have progressed slightly

The chest radiograph again shows basal predominant linear and reticular abnormalities, suggesting the possibility of fibrotic lung disease. The opacities appear slightly more pronounced compared with prior, but the lung volumes remain normal. No nodules are present. No areas of localized lucency or volume increase to suggest air trapping is seen.

The patient underwent thoracic CT (Figure 3) for further characterization of the abnormalities seen at chest radiography.

Figure 3. Axial thoracic CT displayed in lung windows (A-I, upper left) and soft tissue windows (J-Q, upper right). Movies of lung windows (lower left) and of soft tissue windows (lower right).

Which of the following statements regarding this CT examination is most accurate?

1. The thoracic CT shows basal linear and hyperattenuating nodular interstitial thickening
2. The thoracic CT shows basal predominant intralobular interstitial thickening and honeycombing, suggesting fibrosis and consistent with UIP / IPF
3. The thoracic CT shows miliary nodules
4. The thoracic CT shows multifocal bronchiectasis
5. The thoracic CT shows multiple small nodules with 'tree-in-bud' morphology

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