Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright portable chest radiograph obtained . There are bilateral small layering pleural effusions , not significantly changed from the prior chest radiograph . There is a metallic stent again noted in the region of the left subclavian vein . Mild interstitial pulmonary edema is likely present . The heart and mediastinal contour appear stable . Bony structures appear grossly intact .
    OUTPUT:
    
Mild interstitial edema with bilateral small pleural effusions , essentially unchanged from the prior exam .