Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Left chest wall pacer device is seen with pacer leads extending to the right atrium , right ventricle and coronaries sinus as on prior . Previously noted effusions have resolved in the interval . A rounded density projecting over the left lung base is likely a nipple shadow . Mild blunting persists at the right lung base likely representing residual tiny effusion . No convincing evidence for pneumonia or edema . No pneumothorax is seen . Bony structures are intact .
    OUTPUT:
    
Tiny residual right pleural effusion .