Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . There is persistent left basilar opacity and blunting of the posterior costophrenic angle . Elsewhere , the lungs are clear . The cardiomediastinal silhouette is unchanged and likely enlarged but difficult to assess given silhouetting of the left heart border . Dual - lead left chest wall pacing device is again seen . Hypertrophic changes noted in the spine .
    OUTPUT:
    
Left basilar opacity silhouetting the hemidiaphragm is likely due to a combination of effusion , atelectasis and possible underlying consolidation . Probable small right - sided pleural effusion as well .