Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs were obtained . Median sternotomy wires are intact . Left chest pacemaker has leads terminating in the right atrium and right ventricle . On the frontal view only , there is a subtle area of increased radiodensity in the right upper lobe . There is persistent moderate cardiomegaly with left atrial enlargement . The mediastinal and hilar contours are stable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Subtle increase in radiodensity in the right upper lobe . Early pneumonia shoulder be considered in the differential diagnosis given clinical presentation . Findings were communicated with Dr .___ at 11 am via telephone on ___ .