Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Subtle left lower lobe opacity without definite correlate on the lateral view , and new since ___ , may be consistent with pneumonia , correlate clinically with physical exam findings . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable . Intra-abdominal free air likely associated with recent J tube insertion 7 days ago on ___ .
    OUTPUT:
    
Possible subtle left lower lobe opacity without definite correlate on the lateral view , may represent pneumonia ; correlate clinically with exam findings .