Predominant Pattern & or Distribution
Centrilobular nodules, tree in bud
Additional Findings
Centrilobular nodules mostly (more obvious in upper lungs); typically spare the pleural surface (note that some nodules "touch" the left fissure but mostly in the dependent region of the upper lobe, where this appearance may be due to dependent atelectasis); asymmetric & patchy; some larger nodules that may be areas of consolidation. This seems likely to be infectious. There are some nodules on the right peripheral pleural surface which are not part of the predominant pattern.
Differential diagnosis for centrilobular nodules includes endobronchial spread of other infections, including NTM, bacterial, viral, and aspiration pneumonia.
DDX
Etiology
Mycobacterium Tuberculosis.