CTICasesNecrotizing Bacterial Pneumonia Complicating Viral Pneumonia
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Imaging findings
A young patient presented with upper respiratory and pneumonia symptoms, showing centrilobular nodules (some tree-in-bud) and larger acinar nodules. After testing positive for influenza B, the patient developed necrotic foci, diffuse ground glass opacities, and bronchial dilatation, consistent with necrotizing bacterial pneumonia (methicillin-sensitive Staphylococcus) complicating viral pneumonia, leading to diffuse alveolar damage.
Key takeaways
Viral pneumonias (e.g., influenza B) can be complicated by severe necrotizing bacterial superinfections, leading to rapid clinical deterioration, extensive lung damage, and diffuse alveolar damage, with residual cavitary lesions (pneumatoceles).
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