Correct!
1. The chest CT shows multifocal areas of ground-glass opacity with areas of lobular low attenuation
The chest CT shows multifocal ground-glass opacity in some areas now with a more centrilobular nodular appearance (arrowheads). The CT is very similar to previous, perhaps even slightly regressed in the bases. However, areas of lobular low attenuation are now more conspicuous, suggesting some element of small airway obstruction. No new consolidation or cavitation is evident.
The patient underwent additional testing, including anti-nuclear antibody, cytoplasmic anti-neutrophil cytoplasmic antibodies, and HIV testing, all of which were negative.
Based on these data and the appearance of the most recent chest CT, which of the following is the most likely diagnosis for this patient? (Click on the correct answer to be directed to the tenth of fourteen pages)