Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increased hazy opacity in the left lung adjacent to the hilum in the retrocardiac region . The right lung is clear . There is no effusion or pneumothorax . The cardiomediastinal silhouette is stable . No acute osseous abnormalities .
    OUTPUT:
    
Hazy left mid and lower lung opacity worrisome for pneumonia . Recommend repeat after treatment to document resolution .