Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs demonstrate consolidation in the left upper lobe and air bronchograms . There is no pleural effusion or pneumothorax . The heart size is normal The cardiac , hilar and mediastinal contours are normal .
    OUTPUT:
    
Left upper lobe pneumonia . Recommend follow - up chest radiograph in four weeks to visualize resolution .