Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a new moderate - to - large pleural effusion on the right side which occupies much of the right chest with right upper and basilar lower lobe atelectasis . The right hilum is enlarged raising concern for malignant involvement . There is a small pleural effusion on the left . An irregular nodule is not very well visualized in the left upper lobe but corresponds to a vague left suprahilar opacity which is similar to the prior study . The bones appear demineralized .
    OUTPUT:
    
Moderate to large right - sided pleural effusion with extensive atelectasis in basilar segments of the right lower lobe as well as right upper lobe . This appearance includes right hilar enlargement . Malignancy is a likely explanation for these findings .