Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is a large heterogeneous mass in the region of the right upper lobe and the left perihilar region , consistent with known metastatic disease . A stent is positioned within the left main bronchus and right bronchus intermedius . There is no evidence of pneumothorax . In comparison to the prior study , there is moderate reduction of the left lung volume , with a new small - to - moderate left pleural effusion .
    OUTPUT:
    
1 . Right bronchus intermedius and left main bronchial stents are in place . New reduction of the left lung volume since ___ with a new left pleural effusion . 2 . Extensive right upper lobe and left perihilar masses consistent with known metastatic disease .