Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Complete opacification of the left hemi thorax is re - demonstrated . On the previous CT examination , this finding appears to be due to the presence of a large pleural effusion combined with multiple pleural masses and pleural thickening . There is mild rightward shift of mediastinal structures . Right sided PICC tip terminates in the right atrium . The right lung demonstrates atelectatic changes in the lung base . Pulmonary vasculature is normal . No pneumothorax is present , and no right - sided pleural effusion is demonstrated .
    OUTPUT:
    
1 . Complete opacification of the left hemi thorax due to the presence of a large pleural effusion , pleural thickening , and multiple pleural masses , better depicted on previous CT . 2 . Mild right basilar atelectasis . No radiographic evidence of pneumonia .