Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There is left mid - to - lower lung atelectasis . There is blunting of the left costophrenic angle which may be due to a small pleural effusion . There is also a large left hernia with air - fluid levels seen . The cardiac silhouette is top normal to mildly enlarged . The right lung is clear . There is no right pleural effusion . There is no pneumothorax .
    OUTPUT:
    
Left - sided hernia , may be diaphragmatic or hiatal with air - fluid levels seen and with blunting of the left costophrenic angle which may be due to atelectasis with possible small pleural effusion .