Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right lung base opacity has significantly increased in size since ___ , with unclear etiology . This was not seen on the most recent CT scan in ___ . There are no other and new areas of consolidation , pleural effusions or pneumothorax . No pulmonary edema . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Increasing right lung base opacity of unknown etiology . This should be evaluated with CT chest .