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Chronic Hypoparathyroidism Due to Partial Thyroidectomy with Intracranial Calcification
1Department of Internal Medicine, Faculty of Medicine, Universitas Pelita Harapan-Siloam Hospital Lippo Village, Banten, Indonesia.
Acta Medica Indonesiana
|June 1, 2016
Summary
A patient with a history of thyroid surgery developed hypoparathyroidism, leading to intracranial calcifications. This case highlights the link between chronic hypocalcemia and brain calcification, particularly in the basal ganglia and thalamus.
Area of Science:
- Endocrinology
- Neurology
- Radiology
Background:
- A 57-year-old female presented with recurrent headaches, fatigue, and extremity numbness/rigidity.
- She had a history of partial thyroidectomy 20 years prior and was on thiamazole for hypothyroidism.
Observation:
- Laboratory tests revealed mild anemia, slightly low calcium, and normal free T4.
- Parathyroid hormone (PTH) levels were low, confirming hypoparathyroidism.
- Brain CT scan showed symmetrical bilateral calcifications in the cerebral cortex, basal ganglia, thalami, and cerebellum.
Findings:
- The patient's symptoms of numbness and rigidity were likely due to chronic hypocalcemia.
- Intracranial calcifications, especially in the basal ganglia and thalami, are a known manifestation of chronic hypoparathyroidism.
- The exact mechanism involves hyperphosphatemia promoting ectopic calcification in brain tissue.
Implications:
- This case underscores the importance of monitoring calcium and PTH levels in patients with a history of thyroid surgery.
- Early diagnosis and management of hypoparathyroidism can prevent neurological complications like intracranial calcification.
- Further research into the precise mechanisms linking hypoparathyroidism, hyperphosphatemia, and intracranial calcification is warranted.
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