Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . Lungs are hyperinflated . As seen previously , there is a poorly defined opacity obscuring the right heart border which could represent pneumonia , though given persistence over time , possibility of a pulmonary mass lesion is a concern . Aside from this , the lungs are clear . No pleural effusion or pneumothorax . Cardiomediastinal silhouette appears stable . Bony structures are intact .
    OUTPUT:
    
Poorly defined opacity obscuring the right heart border in the right middle lobe region . Given persistence over time , a CT is recommended to further assess .