CTICasesPulmonary Tuberculosis
Imaging findings
High-resolution chest CT shows classic findings of post-primary pulmonary tuberculosis, including large, thick-walled cavitary lesions in both upper lobes. Extensive, prominent centrilobular tree-in-bud nodules and lobular consolidation are present in a bronchogenic distribution, representing active infectious bronchiolitis.
Key takeaways
Active post-primary tuberculosis classically presents with upper lobe cavities and bronchogenic spread of infection. The tree-in-bud pattern on CT represents impaction of terminal bronchioles with necrotic debris, mucus, and inflammatory cells, and is highly indicative of active, infectious disease that requires immediate isolation and therapy.
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