Neck management in medullary thyroid carcinoma

Area of Science:

• Oncology
• Surgical Oncology
• Endocrine Surgery

Background:

• Medullary thyroid carcinoma (MTC) presents a significant challenge due to potential lymph node involvement.
• Understanding metastasis patterns and prognostic factors is crucial for effective MTC management.

Purpose of the Study:

• To retrospectively analyze the incidence and patterns of lymph node metastases in MTC.
• To evaluate surgical treatment strategies and identify prognostic factors for MTC patients.

Main Methods:

• Retrospective analysis of 67 MTC patients who underwent surgery.
• Detailed examination of surgical procedures including thyroidectomy, various neck dissections (bilateral, unilateral, paratracheal), and radiation therapy.

Main Results:

• High incidence of lymph node metastases observed (91% in ipsilateral neck, 91% in paratracheal, 63% in contralateral dissections).
• Level VI nodal involvement was frequent (91%), often undetected preoperatively.
• Locoregional recurrences occurred in 22 patients; advanced stage, high nodal burden, and incomplete resection correlated with poorer survival.

Conclusions:

• The high rate of locoregional recurrences supports a more aggressive surgical approach for MTC.
• Routine central and ipsilateral selective neck dissection (levels II-V) is recommended due to high metastasis rates and low morbidity.
• Re-operation with neck dissection is advised for patients with elevated calcitonin levels post-thyroidectomy alone.