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An autonomously functioning thyroid carcinoma associated with euthyroid Graves' disease.

T Michigishi1, Y Mizukami, N Shuke

  • 1Department of Nuclear Medicine, Pathology Section, Kanazawa University Hospital, Japan.

Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine
|November 1, 1992
PubMed
Summary
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This case study presents a rare autonomously functioning thyroid carcinoma in a 39-year-old man. Despite a hot nodule on scan, the malignancy was confirmed, highlighting a rare diagnostic challenge.

Area of Science:

  • Endocrinology
  • Oncology
  • Nuclear Medicine

Background:

  • Presents a rare case of autonomously functioning thyroid carcinoma, with only 17 similar cases reported.
  • Discusses a patient with unilateral Graves' ophthalmopathy and normal thyroid-stimulating hormone (TSH) levels.

Observation:

  • A T3 suppression test indicated autonomous thyroid function.
  • A radioactive iodine ((123)I) scan showed a 'hot' nodule at the site of a papillary carcinoma.
  • The nodule's hyperfunction persisted after T3 administration, confirmed by (131)I microautoradiography.

Findings:

  • The study confirms hyperfunction within the thyroid carcinoma itself.
  • Demonstrates that a 'hot' nodule on radioiodine scans, though typically benign, can represent malignancy.

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Implications:

  • Highlights the importance of considering malignancy in 'hot' thyroid nodules, challenging conventional diagnostic assumptions.
  • Contributes to the limited literature on autonomously functioning thyroid carcinomas, aiding future diagnosis and management.