Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval increase in interstitial markings left lung , which may reflect progression of widespread disseminated metastasis or possibly concurrent infection in left lung . The previously seen pneumonia in the right lung has improved in the interval but has not completely resolved . There is a small right pleural effusion . No left pleural effusion . There is no pneumothorax . Cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
1 . Interval increase in interstitial markings in the left lung , suggestive of progressing widespread disseminated metastases or possibly concurrent infection . 2 . Previously seen pneumonia in the right lung has improved in the interval , but still substantial . 3 . Small right pleural effusion .