Status post-follow-up colonoscopy for polyps following right hemicolectomy due to colon cancer. The patient suffered from malaise, shivers, abdominal pain, vomiting, and a feeling of unease. She was haemodynamically stable, but her saturation was ~80% with nasal cannula. The patient refused to receive oxygen by mask.

The initial chest radiograph taken on admission shows patchy alveolar infiltrates in the left lung, most consistent with aspiration of stomach contents during colonoscopy due to sedation.

The follow-up radiograph taken 5 days later shows partial resolution, with infiltrates remaining only in the lingula.