CTICasesPost-Transbronchial Biopsy Cavitary Lesions ("Bronc Bites") and Pneumothorax
Imaging findings
High-resolution CT shows two small, newly developed, well-defined cavitary lesions in the right upper lobe, surrounded by a thin halo of ground-glass opacity representing hemorrhage. These lesions align precisely with the subsegmental airways targeted during a recent transbronchial biopsy. Chest radiograph confirms a subsequent moderate post-procedural pneumothorax.
Key takeaways
"Bronc bites" are small, temporary, focal cavitary or cystic pulmonary lesions that form directly at the site of a transbronchial biopsy. Because they can have surrounding hemorrhage, they may mimic septic emboli, cavitary infections, or necrotizing nodules on post-procedure CT. Recognizing the patient's clinical history of a recent transbronchial biopsy and the precise location along the biopsied airway segments avoids unnecessary infectious workups.
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