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Thyroid cancer with concurrent hyperthyroidism.

T C Chao1, J D Lin, L B Jeng

  • 1Department of Surgery, Chang Gung University College of Medicine and Chang Gung Memorial Hospital, Taipei, Taiwan. ischen01@ms15.hinet.net

Archives of Surgery (Chicago, Ill. : 1960)
|February 20, 1999
PubMed
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Patients with thyroid cancer and hyperthyroidism often have small tumors. Higher pre-treatment thyroid hormone levels may predict metastases in these cases.

Area of Science:

  • Endocrinology
  • Oncology
  • Surgical Pathology

Background:

  • Hyperthyroidism is a condition characterized by excessive thyroid hormone production.
  • Differentiated thyroid carcinomas are the most common type of thyroid cancer.

Purpose of the Study:

  • To investigate clinical features, outcomes, and metastasis predictors in patients with thyroid cancer and hyperthyroidism.
  • To identify factors influencing the development of metastases in this patient cohort.

Main Methods:

  • Retrospective analysis of 37 patients with differentiated thyroid carcinoma and hyperthyroidism who underwent surgery between 1979 and 1995.
  • Follow-up ranged from 562 days to over 14 years, with data collected on tumor characteristics, treatment, and outcomes.

Main Results:

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  • Most patients (68%) had small tumors (≤10 mm). Metastases occurred in 7 patients (1 local recurrence, 3 regional lymph nodes, 3 distant).
  • Factors like age, sex, tumor size, and surgical extent did not predict metastases.
  • Significantly higher pre-treatment serum triiodothyronine and thyroxine levels were observed in patients who developed metastases.

Conclusions:

  • The majority of thyroid cancers co-occurring with hyperthyroidism are small.
  • Elevated pre-treatment thyroid hormone levels may indicate a higher risk of metastases in these patients.