Figure 2.

Cervical lymph node dissection. (A) A collar incision was made along the purple line, and upper, middle, and lower jugular group and posterior triangle group lymph node dissection (level II-V) was performed. (B) Lymph nodes (circle), left internal jugular vein (black arrows), and left common carotid artery (white arrows). (C) After dissection: left internal jugular vein (black arrows), left common carotid artery (white arrows), left external jugular vein (white arrowheads), left phrenic nerve (black arrowheads), and left lobe of the thyroid gland (†).