Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs . Allowing for differences in technique , the size of the right pneumothorax is not significantly changed . However , small pleural effusion is now visible . Again noted are parenchymal abnormalities throughout the right lung , better characterized on recent PET - CT . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
Small right hydropneumothorax , stable from 2 hours prior .