Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The mediastinal and hilar contours are unchanged . Mild upper zone vascular redistribution suggests mild pulmonary vascular congestion . There are small bilateral pleural effusions , new from the previous study . No focal consolidation or pneumothorax is present . There are moderate multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
Mild pulmonary vascular congestion and small bilateral pleural effusions .