Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The re is a mild diffuse interstitial abnormality , which is of uncertain etiology and chronicity . The abnormality is more pronounce in the right lung . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
Mild diffuse interstitial abnormality , which may be chronic , although an acute atypical infection can not be excluded .