CTICasesActive Pulmonary Tuberculosis (TB)
Imaging findings
Cavitation in the upper lobes, traction bronchiectasis, volume loss, pleural thickening, and new small airway clusters (tree-in-bud opacities) distant from chronic areas.
Key takeaways
Distinguishing active TB in patients with prior disease is difficult; tree-in-bud or centrilobular nodules away from established disease strongly suggest ongoing mycobacterial spread.
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