Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with ___ , there are increasing heterogeneous opacities at the lung bases . Large left hilum is similar to prior however is increased since ___ and may reflect an enlarged left pulmonary artery or lymphadenopathy . There is a small left pleural effusion . No pneumothorax . An endotracheal tube is appropriately positioned , terminating 4 .5 cm above the carina .
    OUTPUT:
    
Increasing heterogeneous opacities at the lung bases is most consistent with multifocal pneumonia . Small left pleural effusion .