Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is borderline enlarged , but normal . Mediastinal and hilar contours are similar with widening of the inferior mediastinal contour compatible with known esophageal varices . Pulmonary vasculature is normal . New focal opacity is seen projecting over the left mid lung field , which could reflect an area of infection . The right lung is clear . No pleural effusion or pneumothorax is identified . No acute osseous abnormality is detected .
    OUTPUT:
    
New focal opacity projecting over the left mid lung field , which could reflect an area of infection .