Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal contours are within normal limits . Bulging of hilar contours may reflect lymphadenopathy compatible with the patient 's known sarcoidosis . The lung volumes are low but clear of consolidation . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Stable bilateral hilar lymphadenopathy compatible with known sarcoidosis , but no acute cardiopulmonary process ; low lung volumes .