Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest were obtained . There is a moderate sized left pleural effusion with left lower lobe atelectasis . Please note left lower lobe pneumonia can not be excluded . The right lung appears clear without effusion or pneumothorax . Heart size is difficult to assess given obscuration of the left heart border . Mediastinal contour is normal . Bony structures appear intact .
    OUTPUT:
    
Moderate left pleural effusion with associated lower lobe consolidation which may represent atelectasis and / or pneumonia .