Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart appears to be enlarged as previously seen . There is increased pulmonary vascular congestion , more prominently on the left . There is also slight widening of the upper mediastinum on the right , possibly indicating engorgement of the azygous vein . Although no consolidation is noted , the pattern of pulmonary congestion makes it difficult to exclude an overlying developing infilterate . No pleural effusions and no pneumothorax .
    OUTPUT:
    
Increased pulmonary vascular congestion , overlying developing infiltrate can not be ruled out .