Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided Port - A - Cath tip terminates in the proximal right atrium . Severe enlargement of the cardiac silhouette is unchanged . There is continued mild pulmonary edema . The mediastinal and hilar contours are similar . Small bilateral pleural effusions have decreased in size compared to the previous study . Patchy opacities in lung bases may reflect compressive atelectasis . No pneumothorax is seen . There are moderate multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
Severe cardiomegaly with mild pulmonary edema . Small bilateral pleural effusions , decreased in size compared to the previous exam . Patchy opacities in lung bases may reflect atelectasis .