Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette is upper limits of normal in size . Pulmonary vascularity is normal . Substantial left lower lobe atelectasis is present accompanied by an adjacent moderate left pleural effusion . Small right pleural effusion is also evident with adjacent atelectasis at the right base . Healed right rib fractures are demonstrated .
    OUTPUT:
    
Moderate left and small right pleural effusions with adjacent basilar atelectasis , most substantial in the left lower lobe . Co-existing pneumonia can not be excluded in the appropriate clinical setting .