Hyperthyroidism caused by excessive consumption of sausages

Area of Science:

• Internal Medicine
• Endocrinology
• Clinical Nutrition

Background:

• Hyperthyroidism, excessive thyroid hormone production, is often caused by Graves' disease.
• Exogenous thyroid hormone intake can mimic hyperthyroidism symptoms but is difficult to diagnose.
• Thyroid-contaminated food causing exogenous hyperthyroidism is rarely documented.

Observation:

• A 77-year-old man presented with laboratory-confirmed hyperthyroidism.
• Initial investigations, including antibody tests and thyroid scintigraphy, were inconclusive.
• The patient reported excessive daily consumption of sausages.

Findings:

• Thyroid hormones were detected in the patient's consumed sausages.
• Low thyroglobulin levels were noted.
• Discontinuation of sausage consumption led to the resolution of hyperthyroidism.

Implications:

• This case highlights the importance of thorough patient history, including dietary habits, in diagnosing unusual causes of hyperthyroidism.
• Contaminated food sources should be considered in cases of unexplained hyperthyroidism.
• Dietary interventions can effectively manage exogenous hyperthyroidism.