Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size remains mildly enlarged . Mediastinal contour is grossly unchanged . Mild pulmonary edema is worse in the interval . More focal opacity in the retrocardiac region may reflect atelectasis . Small left pleural effusion also appear slightly increased from the prior study . No pneumothorax is present . Posterior fusion rods and cerclage wires are seen throughout the imaged spine . Patient is status post bilateral total shoulder arthroplasties .
    OUTPUT:
    
Worsening mild pulmonary edema and increased small left pleural effusion with retrocardiac atelectasis .