Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are obtained . The lungs are well expanded and clear . The cardiomediastinal silhouette is unremarkable . The visualized osseous structures are also unremarkable . A slight impression on the right side of the cervical trachea is again seen .
    OUTPUT:
    
No acute cardiopulmonary disease . Slight impression on the right side of lower cervical trachea may represent a thyroid nodule .