Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is moderate to large left - sided pleural effusion . Opacity at the right lung base laterally could be due to subpulmonic effusion and potential atelectasis . Lungs are otherwise clear . Right chest wall port catheter tip projects over the SVC . Cardiac silhouette can not be assessed due to silhouetting on the left . Left axillary surgical clips are identified . No acute osseous abnormalities .
    OUTPUT:
    
Moderate to large left pleural effusion .