Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a tortuous thoracic aorta , with aortic arch calcifications noted . The cardiomediastinal silhouettes are otherwise within normal limits . The bilateral hila are unremarkable . A calcific density in the region of the left hilum may represent a calcified lymph node . The bilateral hila are otherwise unremarkable . The lungs are clear . There is no pneumothorax or pleural effusion . There is no evidence of osseous abnormality .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Calcific density in the area of the left hilum may represent a calcified lymph node .