Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . Slight subpleural thickening at each lung apex is stable and typical for minor scarring of doubtful clinical significance in most cases .
    OUTPUT:
    
Stable appearance of the chest . No evidence for acute disease or for prior or reactivation tuberculosis .