Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is very mild worsening of the small left pleural effusion from ___ . The left retrocardiac opacity which is most likely basilar atelectasis is unchanged from ___ . THere is no right pleural effusion . Right lung is clear . There is no pleural effusion . Cardiomediastinal and hilar structures are normal . Cardiac size is normal .
    OUTPUT:
    
1 . Very mild worsening of small left pleural effusion and unchanged left basilar atelectasis as compared to ___ .