Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . The heart is normal in size . The aortic arch is calcified . The chest is hyperinflated . Trace pleural effusions are suspected . There is also a patchy new left basilar opacity predominantly in the left lower lobe . Subpleural thickening at each lung apex appears stable . Bilateral nipple shadows are visualized . The bones are probably demineralized and degenerative changes and mild loss among lower thoracic vertebral body heights is unchanged . Mild - to - moderate S - shaped spinal curvature is also present .
    OUTPUT:
    
Left lower lobe opacity , concerning for pneumonia .