Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a normal cardiomediastinal silhouette and fairly well - aerated lungs . There is retrocardiac opacity concerning for pneumonia . There is also likely a small left pleural effusion . No pneumothorax is visualized . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
Left lower lobe consolidation concerning for pneumonia and small left pleural effusion .