Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . There is mild cardiomegaly . The aorta is tortuous . This possible rightward indentation on the trachea in the upper chest , likely due to enlarged thyroid gland . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Mild cardiomegaly . Rightward indentation on the trachea in the upper chest , enlarged left lobe of the thyroid gland seen on cervical spine CT .