Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: At the left base , the hazy opacification has become more confluent in comparison to the prior CT scout view from ___ . This may represent new infection , lymphangitic spread of his known metastatic disease , or less likely , atelectasis . Mild opacification in the right upper lobe and left apex is unchanged . The patient is status post a left upper lobectomy . A prominent left hilum likely again seen . There is no large pleural effusion . There is no pneumothorax . A right Port - A - Cath terminates in the atriocaval junction .
    OUTPUT:
    
1 . Increasing opacification of the left base may reflect infection , aspiration , lymphangitic spread of the patient 's known metastatic disease , or less likely , atelectasis . 2 . Stable opacifications in the bilateral apices are likely due to metastatic disease or scarring . 3 . Known metastatic disease .