Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left perihilar subtle opacity seen on the PA , which projects posteriorly on the lateral , is likely infectious in etiology . There is no pleural effusion or or pneumothorax . The cardiomediastinal silhouette is unremarkable . There are no acute skeletal abnormalities .
    OUTPUT:
    
Left mid lung pneumonia . These findings were reported to Dr . ___ by Dr . ___ ___ telephone at 2 : 30 pm .