CTICasesUnilateral Aspiration post-Colonoscopy
Imaging findings
Chest radiograph and CT show extensive, unilateral, multilobar consolidation in the left lung. The patient had undergone a colonoscopy under sedation while lying in the left lateral decubitus position, and follow-up imaging showed rapid, complete resolution over 48 hours.
Key takeaways
Aspiration pneumonia or pneumonitis frequently affects the dependent lung zones based on patient positioning at the time of the event. During colonoscopy, patients are routinely placed in the left lateral decubitus position; aspiration under sedation typically causes unilateral left lung consolidation, which resolves rapidly with conservative care.
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