Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is moderately severe pulmonary edema predominantly in a perihilar distribution . Superimposed pneumonia would be difficult to exclude , particularly at the lung bases . Blunting of the left costophrenic angle suggests at least a small pleural effusion . No sizable pleural effusion on the right . No pneumothorax . Heart size is enlarged . No acute osseous abnormalities identified .
    OUTPUT:
    
1 . Moderately severe pulmonary edema . 2 . Small left pleural effusion .