Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded . Eventration of the right hemidiaphragm is redemonstrated . Again there is some blunting of the right costophrenic sulcus , possibly reflecting small pleural effusion . The heart is not enlarged . There is worsening perihilar opacity likely in the posterior segment of the right upper lobe which may reflect pneumonia . There is no pneumothorax . A hiatal hernia is redemonstrated , with air - fluid level in the left lower hemithorax . Again there are notable degenerative changes in the lumbar spine with retrolisthesis of a lower thoracic level , unchanged since the prior study .
    OUTPUT:
    
Worsening right perihilar opacity may reflect pneumonia . Followup chest radiograph is necessary to demonstrate resolution and CT of the chest if finding persists . These results were telephoned by ___ to ___ at 11 :55 a .m . , ___ , five minutes after discovery .