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Single center experience in primary surgery for medullary thyroid carcinoma
Jörg Ukkat1, Oliver Gimm, Michael Brauckhoff
1Department of General Surgery, Martin-Luther-University Halle-Wittenberg, Ernst-Grube-Strasse 40, D-06097 Halle/Saale, Germany.
World Journal of Surgery
|November 2, 2004
Summary
Early surgery for medullary thyroid carcinoma (MTC) improves outcomes. Prophylactic surgery for RET mutations and timely intervention at node-negative stages are key for biochemical cure in MTC patients.
Area of Science:
- Endocrinology
- Surgical Oncology
- Genetics
Background:
- Medullary thyroid carcinoma (MTC) is a rare endocrine neoplasm.
- Optimal surgical management strategies for MTC remain challenging due to disease rarity and study limitations.
- Germline RET mutations predispose individuals to MTC, often necessitating prophylactic thyroidectomy.
Purpose of the Study:
- To analyze surgical outcomes in a large cohort of medullary thyroid carcinoma (MTC) patients.
- To evaluate the impact of surgical extent and timing on biochemical cure rates.
- To provide evidence-based recommendations for surgical management of MTC.
Main Methods:
- Retrospective analysis of 440 MTC patients undergoing surgery since 1995.
- Detailed review of primary operations (n=188), including prophylactic surgeries (n=60).
- Assessment of total thyroidectomy (TTx) and varying lymph node dissection (LND) extents.
- Correlation of tumor stage (pT), lymph node metastases (LNM), and distant metastases (DM) with outcomes.
- Evaluation of biochemical cure rates based on calcitonin levels and surgical interventions.
Main Results:
- Biochemical cure was achieved in 72% of patients after primary surgery.
- Prophylactic surgery in 60 patients with RET mutations resulted in 100% biochemical cure.
- Lymph node metastases (LNM) prevalence increased with tumor stage (17% in pT1 to 100% in pT4).
- Distant metastases (DM) also correlated with tumor stage (0% in pT1 to 81% in pT4).
- Lymph node dissection (LND) was associated with increased complication rates.
- Elevated calcitonin levels were consistently observed in patients with LNM.
Conclusions:
- Early surgical intervention, particularly prophylactic surgery for RET mutation carriers, significantly improves MTC outcomes.
- Timely surgery at a node-negative stage is crucial for achieving biochemical cure.
- Surgical strategy should be tailored: TTx with cervicocentral LND for normal basal/elevated stimulated calcitonin, and inclusion of cervicolateral LND if basal calcitonin is elevated.