Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient rotation slightly limits the exam . Heart size remains mild to moderately enlarged . Mild pulmonary edema is present . Retrocardiac opacification and small to moderate size left pleural effusion are new compared with the previous exam . Small right pleural effusion is also seen . Rounded opacity in the right cardiophrenic angle is unchanged and likely reflective of a pericardial cyst . No pneumothorax is present . Degenerative changes of both acromioclavicular joints are noted .
    OUTPUT:
    
Mild congestive heart failure with moderate size left and small right pleural effusion . Retrocardiac opacification could reflect compressive atelectasis but infection can not be excluded . Rounded opacity within the right cardiophrenic angle appears unchanged and likely reflects a pericardial cyst .