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Updated: May 27, 2026

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Published on: February 9, 2024
Simultaneous occurrence of subacute thyroiditis and Graves' disease.
Thanh D Hoang1, Vinh Q Mai, Patrick W Clyde
1Department of Endocrinology, National Naval Medical Center, Bethesda, Maryland 20889-5600, USA.
This case study presents the first instance of simultaneous Graves' disease and subacute thyroiditis (SAT). The findings suggest SAT may trigger Graves' disease in genetically susceptible individuals.
Area of Science:
- Endocrinology
- Immunology
- Pathology
Background:
- Graves' disease and subacute thyroiditis (SAT) are distinct autoimmune thyroid conditions.
- While Graves' disease can occur after SAT, simultaneous occurrence is exceptionally rare.
Observation:
- A 41-year-old woman presented with symptoms of hyperthyroidism and neck pain.
- Laboratory results indicated elevated thyroid hormones, positive thyroid antibodies, and inflammatory markers.
- Thyroid biopsy confirmed granulomatous thyroiditis, consistent with SAT.
Findings:
- The patient exhibited simultaneous Graves' disease and SAT.
- Human leukocyte antigen (HLA) typing revealed a genetic predisposition.
- A strong family history of autoimmune thyroid disorders was noted.
Implications:
- This case highlights a rare presentation of co-occurring Graves' disease and SAT.
- SAT-induced immune alterations may precipitate Graves' disease in susceptible individuals.
- Genetic factors play a significant role in the development of these conditions.
Related Concept Videos
Graves' Disease I: Introduction
Graves Disease II: Pathophysiology
Hyperthyroidism I: Introduction
Hyperthyroidism II: Pathophysiology
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