Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison with chest radiographs obtained ___ , no significant changes are appreciated . There is unchanged scarring at the lateral left lung base . Lungs are otherwise fully expanded and clear without focal consolidation or suspicious pulmonary nodules . No pleural effusions . Heart size is normal . Cardiomediastinal hilar silhouettes are normal .
    OUTPUT:
    
Unchanged scarring at the lateral left lung base . No radiographic evidence of pneumonia or pleural effusions .