Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette is normal in size . The mediastinal contour is unremarkable . Multifocal , relatively diffuse ill - defined nodular opacities are noted in both lungs , predominantly in a perihilar and basilar distribution . Small left pleural effusion is likely present . The hila appear prominent bilaterally and underlying lymphadenopathy is suggested . No pneumothorax is present . No acute osseous abnormality seen .
    OUTPUT:
    
Ill - defined diffuse nodular opacities , most pronounced in the perihilar regions and lung bases bilaterally , concerning for multifocal pneumonia . Small left pleural effusion . Followup radiographs after treatment are recommended to ensure resolution of these findings .