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Unilateral upper limb chorea associated with hyperthyroidism: A case report and literature review
Wei Chen1, Bin Wu1, Hongna An1
1Department of Neurology, The Second People's Hospital of Quzhou, Quzhou, China.
Insights
This case study highlights that chorea, involuntary movements, can be an early sign of hyperthyroidism. Prompt thyroid function tests are recommended for patients presenting with chorea to ensure timely diagnosis and treatment.
Area of Science:
- Neurology
- Endocrinology
Background:
- Chorea is a hyperkinetic movement disorder often associated with Huntington's disease and hyperglycemia.
- Grave's disease, a form of hyperthyroidism, can occasionally present with chorea.
Observation:
- A 44-year-old woman with a history of primary hyperthyroidism presented with a year of involuntary movements.
- Physical examination confirmed choreic movements in her right arm, characterized by rapid, irregular, and spontaneous motions.
Findings:
- Laboratory results showed elevated triiodothyronine (T3) and free thyroxine (FT4) with suppressed thyroid-stimulating hormone (TSH), confirming hyperthyroidism.
- Electroencephalogram and brain MRI were normal, ruling out structural brain abnormalities.
Implications:
- This case suggests hemichorea can be an initial manifestation of hyperthyroidism.
- Routine thyroid function testing is crucial for patients with chorea to identify underlying thyroid dysfunction.
Abstract:
Chorea, a hyperkinetic syndrome, is generally reported in patients with Huntington's disease (HD), hyperglycemia, and other diseases but occasionally occurs in patients with Grave's disease. Here, we report a 44-year-old woman presenting with a 1-year history of involuntary movements with a known history of primary hyperthyroidism. Physical examination revealed the continuous, rapid, irregular, and spontaneous choreic movement of her right arm. Laboratory investigations demonstrated increased triiodothyronine (T3) and free thyroxine (FT4) and suppressed thyroid-stimulating hormone (TSH) levels. An electroencephalogram and brain magnetic resonance imaging were normal. After antithyroid treatment, the patient achieved complete remission. Our case indicated that hemichorea might initially manifest hyperthyroidism. Therefore, thyroid function tests should be routinely performed in patients with chorea.
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