Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Similar appearance of large loculated left pleural effusion status post interval pigtail catheter which projects over the left lower hemi thorax . There subsequent persistent rightward shift of midline structures . No large pneumothorax seen on the current study . Cardiac and mediastinal silhouettes are grossly stable .
    OUTPUT:
    
Similar appearance to large loculated left pleural effusion with now a pigtail catheter projecting over the left lower hemithorax . No large pneumothorax seen .