Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are provided . There is a focal air space consolidation along the left heart border , concerning for pneumonia in the lingula . Otherwise , the lungs are clear . No effusion or pneumothorax . The heart and mediastinal contours appear normal . The bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Focal opacity in the lingula , concerning for pneumonia . Consider followup to resolution to exclude underlying malignancy .