Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph provided . AICD is again noted with leads extending to the region of the coronary sinus , right atrium and right ventricle . There is opacity at the right lung base with blunting of the right CP angle likely representing partially layering small pleural effusion . There is no overt pulmonary edema . Cardiomediastinal silhouette is stable . Bony structures are intact .
    OUTPUT:
    
Layering small right pleural effusion . No overt edema .