Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left lower lung opacity and increased retrocardiac density reflects combination of effusion and accompanying passive atelectasis . If any of this represents infection , can not be convincingly ruled out on the single frontal chest radiograph alone and should be correlated clinically . Small right pleural effusion and minimal right basal atelectasis is present . Upper lungs are clear . Heart size is mildly enlarged and has a triangular configuration and is concerning for pericardial effusion . Echocardiography is recommended for further evaluation . Mediastinal and hilar contours are unremarkable .
    OUTPUT:
    
1 . Mild - to - moderate left and minimal right pleural effusion with accompanying atelectasis . If any of this left lower lung opacity represents concurrently associated infection , can not be ruled out , requires further clinical correlation . 2 . Mild cardiomegaly with a triangular configuration of the heart which is concerning for pericardial effusion . Echocardiography is recommended for further evaluation .