Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is enlarged . The pulmonary vasculature is unremarkable . No pleural effusion or pneumothorax is identified . Faint opacity is noted in the retrocardiac region , which may represent early pneumonia . There is dextroscoliosis of the visualized thoracic spine .
    OUTPUT:
    
1 . Possible left lower lobe pneumonia . 2 . Cardiomegaly .