Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is likely top normal . The mediastinal and hilar contours are unremarkable . There is mild pulmonary vascular congestion . Moderate sized left pleural effusion , partially loculated laterally , is noted . Left basilar opacification may represent known tumor with infection or atelectasis . Trace right pleural effusion is also demonstrated . There is no pneumothorax . Mild S - shaped scoliosis is seen with multilevel degenerative changes .
    OUTPUT:
    
Moderate left pleural effusion , partially loculated laterally , with left basilar opacification which may reflect known malignancy with atelectasis or infection . Trace right pleural effusion . Mild pulmonary vascular congestion .