Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . There is new retrocardiac opacity silhouetting the medial hemidiaphragm . Elsewhere , the lungs are clear . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormality detected .
    OUTPUT:
    
Left lower lobe consolidation compatible with pneumonia in the proper clinical setting .