Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In the left perihilar region is a large mass - like opacity with irregular borders which is new from the prior radiograph . Elevation of the left hemidiaphragm suggests volume loss and probable obstruction in the region of the mass . At the right base there is a stable 5 mm dense nodule . There is no edema , pleural effusions , or pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
Aggressive appearing left perihilar mass with associated volume loss . Recommend CT scan for further evaluation . Results were communicated with Dr . ___ at 130 pm on ___ via telephone by Dr . ___ .