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Reoperation for recurrent or persistent medullary thyroid cancer
J F Moley1, S A Wells, W G Dilley
1Department of Surgery, Washington University School of Medicine, St. Louis, Mo.
Surgery
|December 1, 1993
Summary
Repeat neck surgery for medullary thyroid cancer (MTC) can normalize or significantly decrease calcitonin levels in many patients. However, invasive primary tumors may reduce the likelihood of successful outcomes from reoperation.
Area of Science:
- Endocrinology
- Surgical Oncology
Background:
- Initial surgery for medullary thyroid cancer (MTC) often leaves residual disease, indicated by elevated calcitonin.
- Persistent high calcitonin levels post-thyroidectomy suggest incomplete MTC eradication.
Purpose of the Study:
- To evaluate the efficacy of repeat neck exploration and microdissection in patients with medullary thyroid cancer and elevated calcitonin.
- To identify factors influencing the success of reoperation for MTC.
Main Methods:
- Thirty-two patients with MTC and elevated calcitonin post-thyroidectomy underwent repeat neck exploration.
- Surgical procedures included neck dissections and, in some cases, mediastinal dissection.
Main Results:
- Calcitonin levels normalized in 28% of patients and decreased by over 40% in 42% post-reoperation.
- Invasive primary tumors (extranodal or extracapsular spread) were more common in patients with no calcitonin level decrease.
Conclusions:
- Repeat neck surgery is a viable option for managing residual medullary thyroid cancer, achieving biochemical improvement in a significant proportion of patients.
- Tumor invasiveness is a key factor predicting poorer outcomes following reoperation for MTC.