Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly with a tortuous thoracic aorta is unchanged from ___ . Hilar contours are unremarkable . A subtle triangular opacity at the right lung base was not seen previously . Pleural surfaces are clear without effusion or pneumothorax .
    OUTPUT:
    
New , subtle opacity at the right lung base suspicious for pneumonia or mass . A lateral view may be helpful for further characterization .