Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal lung volumes without pleural effusion or pneumothorax . Heterogeneous opacity in the left lung base projecting over spine on the lateral view is new since ___ exam . The hilar and mediastinal silhouettes are unremarkable . Heart size is normal . There is no pulmonary edema . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
Heterogeneous opacity in the left lung base may reflect an atypical infection , which can be confirmed with oblique views or CT exam , as clinically indicated . Findings discussed with Dr . ___ at 7 : 50 am ___ by phone .