Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Nearly complete opacification of the left hemithorax is of increasing density since the recent prior CT . A large area of opacity in the inferior segment of the right upper lobe as well as more patchy right middle lobe involvement were better assessed in recent chest CT from ___ and similar in appearance allowing for difference in techniques . Widespread opacification of the left mid to lower lung is increasingly dense , however . There is no evidence of pneumothorax . The cardiomediastinal contours are stable .
    OUTPUT:
    
Similar extensive alveolar opacities in the inferior segment of the right upper lobe and right middle lobe as well as increased confluent opacification of the left mid to lower lung . The overall appearance suggests severe worsening multifocal pneumonia superimposed on known malignancy .