Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a large right - sided pleural effusion which is difficult to directly compare to the prior PET - CT , but probably similar in size . A suspicious nodule projects over the right upper lobe , measuring 9 mm in diameter . There is only slight leftward shift of mediastinal structures so areas of atelectasis in the right lung coinciding with an effusion , particularly involving the right lower lobe , are suspected . The left lung remains clear . There is no pneumothorax . The cardiac , mediastinal and hilar contours appear unchanged . The bones are probably demineralized .
    OUTPUT:
    
Large right - sided pleural effusion . Suspicious nodule projecting over the right upper lobe .