Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a moderate left pleural effusion . There is increased density in the retrocardiac area consistent with partial atelectasis or consolidation . The right lung is clear . The right costophrenic sulcus is blunted . Mediastinal structures are unremarkable . The bony thorax is grossly intact
    OUTPUT:
    
Left pleural effusion . Atelectasis or consolidation in the left lower lobe .