Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a large left pleural effusion with consolidation in the left mid and lower lung which may represent lower lobe atelectasis , although a mass or infectious process can not be excluded . The left upper lobe and right lung are grossly clear without lobar consolidation , pneumothorax , or pulmonary edema . The heart is mildly enlarged .
    OUTPUT:
    
Mild cardiomegaly . Interval development of a large left pleural effusion with consolidation which may reflect lobar atelectasis , although a mass and other infectious process see should also be considered .