Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The post pneumonectomy appearance of the right hemithorax is unchanged . Airspace opacities at the left base may be due to infection , but it is difficult to discern how much of the left basilar opacification is actually due to layering pleural effusion . There is no left pneumothorax . The cardiomediastinal silhouette can not be accurately assessed .
    OUTPUT:
    
Left basilar airspace disease may be due to pneumonia , but malignancy is difficult to exclude . PA and lateral radiograph may be obtained to assess how much of the left basilar abnormality is due to increasing pleural fluid vs parenchymal disease .