Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a vague asymmetric opacity in the left lower lobe which may represent an area of early infection . Remainder of the lungs are clear . Cardiac and mediastinal silhouette are normal . Hilar contours are unremarkable without pulmonary vascular congestion . No pleural effusion or pneumothorax .
    OUTPUT:
    
Vague asymmetric opacity in the left lower lobe which may represent an area of early infection .