Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . When compared to prior , there has been interval enlargement of the right - sided pleural effusion which is now small to moderate . There is a new moderate left - sided pleural effusion . Underlying atelectasis particularly on the left is suspected noting infection can not be excluded . Superiorly , the lungs are clear . Cardiomediastinal silhouette is difficult to assess given obscuration of the left heart border . No acute osseous abnormalities detected .
    OUTPUT:
    
New moderate left and increase in size of right pleural effusion since prior . Underlying atelectasis suspected , infection is not excluded .