Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is a large left upper lobe mass abutting the mediastinal border measuring approximately 7 .5 cm in the CC direction , perhaps slightly increased since the prior studies . There are no pleural effusions or pneumothorax . The right lung is predominantly clear . The cardiomediastinal silhouette is unchanged . Imaged upper abdomen is unremarkable . There is stable elevation of the left hemidiaphragm . Multiple old healed rib fractures are again noted .
    OUTPUT:
    
Large left upper lobe mass may be slightly increased since the prior studies .