Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Increased opacification of the right lung base without silhouetting of the heart border or the right hemidiaphragm could reflect a lateral segment right middle lobe pneumonia the proper clinical setting . The right - sided hemodialysis catheter ends within the right atrium . There is moderate cardiomegaly . There is no pleural effusion , pneumothorax , or pulmonary edema .
    OUTPUT:
    
Right lung base opacification which could represent right middle lobe pneumonia .