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Lymph node involvement in macroscopic medullary thyroid carcinoma.
P Tamagnini1, M Iacobone, F Sebag
1Department of General and Endocrine Surgery, University Hospital La Timone, 13385 Marseilles, France. ptamagnini@hotmail.com
The British Journal of Surgery
|January 27, 2005
Summary
For large medullary thyroid carcinoma (MTC), preoperative factors do not predict nodal metastasis. Total thyroidectomy and neck node dissection are the recommended treatments for MTC.
Area of Science:
- Endocrinology
- Surgical Oncology
- Pathology
Background:
- Medullary thyroid carcinoma (MTC) is a rare endocrine neoplasm.
- Lymphatic spread in MTC is variable, impacting prognosis.
- Identifying features of nodal metastasis in large MTC is crucial for treatment planning.
Purpose of the Study:
- To identify distinctive clinical and pathological features differentiating large medullary thyroid carcinoma (MTC) with and without nodal metastases.
- To evaluate preoperative predictors of lymph node involvement in MTC.
Main Methods:
- Retrospective analysis of 28 patients with sporadic MTC larger than 10 mm.
- All patients underwent total thyroidectomy and neck node dissection.
- Comparison of clinicopathological characteristics between patients with and without lymph node metastases (N0 vs. N1).
Main Results:
- No significant differences in age, sex, preoperative calcitonin, or tumor size between N0 and N1 groups.
- Tumor invasion, vascular embolism, and peritumoral thyroiditis were significantly different between groups (P < 0.001, P = 0.011, P = 0.039, respectively).
- Biochemical cure rates post-surgery differed, with all N0 patients achieving cure versus half of N1 patients (P = 0.006).
Conclusions:
- Preoperative factors did not predict nodal status in large MTC (>1 cm) in this cohort.
- Total thyroidectomy combined with comprehensive nodal dissection remains the standard surgical approach for MTC.
- Pathological findings like tumor invasion and vascular embolism may be associated with nodal spread.