Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been significant interval increase in right mid - to - lower lung opacity which may represent combination of worsening malignancy and underlying atelectasis / pleural fluid , although underlying infection may also be present . There are areas of lucency that project over the right lower lung opacity which may represent aerated lung , although cavitation is not excluded in the appropriate clinical setting . There is also left lower lobe opacity , to a lesser extent , which could also represent additional site of infection , malignancy , aspiration . No evidence of left pleural effusion is seen . There is no evidence of pneumothorax . The aorta is slightly tortuous . The cardiac silhouette is not enlarged .
    OUTPUT:
    
1 . Significant interval increase in right - sided pulmonary opacity . Differential diagnosis includes worsening of malignant process , with possible underlying right pleural effusion , and / or underlying infectious process . There are areas of lucency projecting over the opacity which may relate to aerated lung although underlying cavitation is not excluded . 2 . Left lower lobe opacity to a lesser extent than the right . Differential diagnosis include infection , aspiration , disease spread .