Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unremarkable . The pulmonary vascularity is not engorged . Hazy ill - defined opacity within the left lower lobe is concerning for an area of developing infection . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Hazy opacity in the left lower lobe concerning for developing infection .