Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate large right pneumothorax , which has significantly increased since ___ exam . There is no leftward shift of hilar or mediastinal structures . The left lung is essentially clear . No pleural effusion . No left pneumothorax . Cardiomediastinal silhouettes are unremarkable . Heart size is normal . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
Large right pneumothorax , increased in size since ___ exam . Findings discussed with Dr . ___ at 10 :25 a .m . ___ by phone , immediately following discovery . Patient was advised to report to the emergency room .