Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . The cardiac and mediastinal contours are normal . In the neck , new indentation on the left side of the trachea is due to mass in or around the left thyroid lobe . There are no pleural abnormalities . Mild multilevel degenerative changes of the thoracolumbar spine are seen .
    OUTPUT:
    
No acute cardiac or pulmonary process . New left neck mass , could be thyroid nodule , and possible explanation for palpitations . ED QA nurses notified by email .