Do medullary thyroid carcinoma patients with high calcitonin require bilateral neck lymph node clearance? A case report

Table 4 Cervical lymph node clearance range

Condition	Treatment
Patients without evidence of cervical lymph nodes and distant metastases before surgery	Preventive central lymph node dissection
Preoperative calcitonin 40-150 pg/mL, even if no suspected lymph node metastasis were found	Central lymph node and ipsilateral II-IV lymph node dissection
Patients with preoperative calcitonin > 200 pg/mL	Ipsilateral neck II-VI lymph node dissection, and contralateral cervical lymph nodes should also be considered for removal