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Incidentally found medullary thyroid cancer: treatment rationale for small tumors
Andreas Raffel1, Kenko Cupisti, Markus Krausch
1Department of General and Trauma Surgery, Heinrich-Heine University, Moorenstrasse 5, 40225 Düsseldorf, Germany. raffel@med.uni-duesseldorf.de
Abstract:
The object of this study was to assess the extent of surgery required for small sporadic medullary thyroid cancers (sMTCs). We retrospectively studied 261 patients with MTCs treated in our institution between 1986 and 2002 and identified 15 patients with small pT1 or pT2 sMTCs. The tumors were diagnosed incidentally, so surgical therapy was less than total thyroidectomy. Total thyroidectomy with or without neck dissection was applied to all other patients as standard surgical treatment of care. Patients were systematically followed up by postoperative ultrasonography, calcitonin, carcinoembryonic antigen levels, and pentagastrin stimulation tests. On long-term follow-up over a period of 4.6 years, the rate of biochemical cure in these patients who underwent less than total thyroidectomy for a sporadic incidentally diagnosed tumor was 100%. We concluded that completion thyroidectomy and neck dissection are not mandatory in patients in whom a solitary small sMTC is incidentally discovered by histologic diagnosis following operation so long as a genetic background is excluded. Nevertheless, such patients require systematic careful long-term follow-up.
Insights
For small, incidentally discovered sporadic medullary thyroid cancers (sMTCs), less than total thyroidectomy can achieve a 100% biochemical cure rate. Completion thyroidectomy and neck dissection are not mandatory if genetic causes are excluded, but long-term follow-up is essential.
Area of Science:
- Endocrinology
- Surgical Oncology
- Oncology
Background:
- Medullary thyroid cancer (MTC) management typically involves total thyroidectomy and potentially neck dissection.
- The optimal surgical extent for small, incidentally discovered sporadic MTCs remains a subject of investigation.
Purpose of the Study:
- To evaluate the necessity of extensive surgical intervention for small, incidentally diagnosed sporadic medullary thyroid cancers (sMTCs).
Main Methods:
- Retrospective analysis of 261 MTC patients treated between 1986 and 2002.
- Identification and detailed follow-up of 15 patients with small pT1 or pT2 sMTCs who underwent less than total thyroidectomy.
- Systematic postoperative monitoring including ultrasonography, calcitonin, carcinoembryonic antigen levels, and pentagastrin stimulation tests.
Main Results:
- Patients with incidentally diagnosed small sMTCs treated with less than total thyroidectomy achieved a 100% biochemical cure rate.
- The average follow-up period was 4.6 years, demonstrating sustained biochemical remission.
Conclusions:
- Completion thyroidectomy and neck dissection are not mandatory for incidentally discovered solitary small sMTCs, provided a genetic background is excluded.
- Careful, systematic long-term follow-up is crucial for these patients.
