Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Increasing left basilar opacity may be secondary to interval aspiration or pneumonia . There is also a new small - to - moderate left pleural effusion . Increasing pleural fluid is also seen on the right , though small . There is ongoing pulmonary vascular congestion , similar to prior , though no overt interstitial edema . Cardiomediastinal and hilar contours are within normal limits . There is no pneumothorax .
    OUTPUT:
    
Increasing left basilar opacity concerning for pneumonia or interval aspiration . Pleural fluid has increased bilaterally , small on the right and moderate on the left .