Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyper inflated . The nodular density in the left upper lobe has cleared . Increased markings are present particularly in the left base , a new finding . . The left basilar disease appears more prominent than previously . There is no pleural effusion . The mediastinum is normal . The heart size is normal . The osseous structures are normal for age .
    OUTPUT:
    
The nodular density in the left upper lobe has cleared , but there is now new left infrahilar left lower lobe parenchymal disease likely pneumonia or atelectasis . Followup recommended .