Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is stable cardiomegaly . Dual - lead left - sided pacemaker is in adequate position with leads terminating in the right atrium and right ventricle . As compared to prior chest radiograph from ___ , there is an increased area of opacity in the right lung base with obscuration of the medial right hemidiaphragm . In the appropriate clinical setting , this could reflect early pneumonia . There is congestion of the upper lobes . There is no definite pneumothorax or pleural effusions .
    OUTPUT:
    
Increased opacity at right lung base with obscuration of the medial right hemidiaphragm . In the appropriate clinical setting , this could represent early pneumonia . Clinical correlation is recommended .