Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Previously seen confluent left upper lobe opacity appears less confluent and less dense as compared to the prior study . No new focal consolidation is seen . There is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are stable and unremarkable .
    OUTPUT:
    
Previously seen left upper lobe opacity corresponding to patient 's lung cancer is less confluent and less dense as compared to the prior study . No new focal consolidation seen .