CTICasesPulmonary Actinomycosis
Imaging findings
Chest radiograph and CT show patchy, progressive consolidation predominantly localized to the right lower lobe, with surrounding airspace disease.
Key takeaways
Pulmonary actinomycosis is a chronic, granulomatous bacterial infection caused by Actinomyces species (such as Actinomyces israelii). It is typically seen in patients with poor oral hygiene and a predisposition to aspiration, mimicking lung malignancy or tuberculosis due to its slow, infiltrative growth.
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