Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are stable in appearance . Right hemidiaphragm appears less distinct than on the prior study and is associated with a subtle area of increased opacification at the right lung base . Lungs are otherwise clear , and there are no pleural effusions or pneumothoraces , but evaluation of the left apex is limited due to obscuration of overlying structures of the chin and neck .
    OUTPUT:
    
Possible early / developing right lower lobe pneumonia . Short - term followup radiographs may be helpful .