Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left lower lobe opacification with air - fluid level adjacent to the posterior pigtail drainage catheter is new since chest radiograph on ___ . A loculated effusion that did not contain air was present in this area on CT examination on ___ , prior to pigtail catheter insertion . The two left pigtail drainage catheters appear unchanged . The moderate loculated left - sided pleural effusion is stable . Lung volumes are slightly improved with stable mild pulmonary edema . No pneumothorax .
    OUTPUT:
    
1 . Left lower lobe opacification with air - fluid level is new since radiograph on ___ . A loculated effusion that did not contain air was seen in this area on CT examination on ___ , prior to pigtail catheter insertion . Constellation of findings is concerning for bronchogenic fistula or less likely lung abscess . 2 . Stable moderate left - sided pleural effusion . 3 . Stable mild pulmonary edema . 4 . No pneumothorax .