Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no substantial pleural effusion remaining following recent thoracentesis although a minimal one may remain ( the right costophrenic angles are partially excluded ) . There is no pneumothorax . The lungs appear clear . The cardiac , mediastinal and hilar contours appear stable . The patient is status post sternotomy .
    OUTPUT:
    
Marked decrease in pleural effusion .