Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is left base opacity which silhouettes the hemidiaphragm . Elsewhere , the lungs are clear . The cardiomediastinal silhouette is within normal limits . Lower thoracic dextroscoliosis is noted .
    OUTPUT:
    
Left lower lobe opacity compatible with a combination of infection and effusion . Underlying lesion can not be excluded and repeat after treatment is suggested to document resolution .