Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette and hila are normal The left retrocardiac , lingula , and left perihilar opacities likely represent multifocal pneumonia . There are no prior studies for comparison available . No pleural effusion and no pneumothorax . Incidental note is made of DISH ( diffuse idiopathic skeletal hyperostosis ) .
    OUTPUT:
    
Multifocal pneumonia . No prior studies are available for comparison .