Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No evidence of pneumothorax . Multiple left - sided rib fractures are again seen . The area of linear opacity adjacent to the left chest wall in the left mid lung , corresponding to the original pigtail catheter site , appears unchanged . Left basilar atelectasis is increased over the interval , as has a left - sided pleural effusion , which is now small to moderate size . Cardiac silhouette is unchanged .
    OUTPUT:
    
1 . No pneumothorax . 2 . Interval increase in left - sided pleural effusion , which is now small to moderate size .