Correct!
2. Unenhanced chest CT shows worsening linear and interstitial abnormalities

Unenhanced chest CT shows persistent, but decreased right paratracheal lymph node enlargement and the previously seen medial right apical nodule [Figure 2] has largely resolved. No new pleural effusion is seen. Significant progression in right-greater-than-left, multifocal, bilateral small interlobular septal thickening associated with some ground-glass opacity is noted. Only minimal lobular right upper lobe consolidation is present.

Which of the following represents the most appropriate descriptionof the CT scan pattern? (Click on the correct answer to be directed to the tenth of fourteen pages).

  1. Reverse ground-glass halo sign
  2. Finger-in-glove sign
  3. CT angiogram sign
  4. Crazy-paving pattern
  5. Atoll sign

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