Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest when compared to the prior study demonstrate new asymmetric opacity at the left base well seen on the frontal and in the retrocardiac region , well seen on the lateral , corresponding to a left lower lobe pneumonia . Additionally , there is mild increase in interstitial markings concerning for worsening pulmonary edema . Mild - to - moderate cardiomegaly is noted and stable . Intact median sternotomy wires are seen . A tortuous aorta alters the contour of the mediastinum which is otherwise unchanged . The remainder of the lung parenchyma is clear . No pleural effusion or pneumothorax is seen .
    OUTPUT:
    
New asymmetric opacity at the left base consistent with left lower lobe pneumonia . Mild interval worsening of pulmonary edema .