Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac and mediastinal contours are unchanged with the heart size is within normal limits . Rightward shift of mediastinal structures due to right - sided volume loss is again noted , with similar appearance of opacity in the right upper lobe and superior segment of the right lower lobe right upper lobe opacity compatible with known malignancy and associated collapse . Hilar contours are unchanged , and no overt pulmonary edema is demonstrated . Streaky opacities are seen in the left lung base , potentially areas of atelectasis . There is no pleural effusion or pneumothorax . Multilevel degenerative changes are again noted in the thoracic spine .
    OUTPUT:
    
No substantial interval change from the previous study . Similar appearance of opacity in the right upper lobe and superior segment of the right lower lobe compatible with known malignancy and associated collapse . Streaky opacities in the left lung base may reflect areas of atelectasis though infection can not be completely excluded .