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Myocarditis associated with Hashimoto's disease: a case report.
G Lorin De La Grandmaison1, M Izembart, P Fornes
1Department of Pathology and Forensic Medicine, Raymond Poincaré Hospital, 104 Boulevard Raymond Poincaré, 92380, Garches, France. glorin@club-internet.fr
International Journal of Legal Medicine
|October 2, 2003
Summary
Sudden cardiac death in a 40-year-old man was linked to autoimmune myocarditis and Hashimoto's thyroiditis. This rare association highlights a potential immune-mediated link between cardiac and thyroid inflammation.
Area of Science:
- Pathology
- Immunology
- Cardiology
Background:
- Sudden cardiac death (SCD) in individuals without prior medical history is uncommon.
- Autoimmune thyroid diseases, such as Hashimoto's thyroiditis, are well-documented but rarely linked to cardiac pathology.
Observation:
- A 40-year-old male experienced SCD with autopsy revealing lymphocytic myocarditis and lymphocytic thyroiditis.
- Inflammatory foci in both organs exhibited a nodular pattern with germinal centers.
- Biochemical and serological analyses indicated hypothyroidism and high titers of antiperoxidase and antithyroglobulin antibodies, consistent with Hashimoto's thyroiditis.
Findings:
- Virological and toxicological studies were negative, ruling out infectious or toxic causes.
- Immunohistochemistry excluded lymphoma and viral myocarditis.
- The cardiac and thyroid inflammatory patterns shared similarities, suggesting a common autoimmune etiology.
Implications:
- This case suggests autoimmune myocarditis may be a rare cause of SCD, potentially linked to Hashimoto's thyroiditis.
- It underscores the importance of considering autoimmune processes in unexplained SCD.
- Further research is warranted to explore the immunological mechanisms connecting thyroid autoimmunity and myocarditis.