Presentation
Chronic cough and respiratory distress.
Patient Data
Age: 55 years
Gender: Male
Axial lung window

Cavitary lesion with decreased lung parenchymal volume is seen at right upper lobe. Alveolar opacity is noted at lingula segment of left upper lobe. Centrilobular nodules with a linear branching pattern are also seen at both lung parenchyma.
Case Discussion
Centrilobular nodules with a linear branching pattern are consistent with tree-in-bud appearance in a patient with endobronchial spreading of post-primary tuberculosis.