A 24-year-old man presented with recurrent seizures to the emergency department. He had previously been diagnosed with epilepsy when he was 14 and had been treated with sodium valproate. He also complained of perioral and fingertip paresthesia. Biochemical investigations showed: Serum calcium: 1.03 mmol/L Magnesium: 0.72 mmol/L Phosphate: 2.57 mmol/L Vitamin D: 55.98 nmol/L Serum parathyroid hormone: 0.6 pmol/L Examination showed the presence of both Chvostek’s and Trousseau’s signs. CT scan (image) showed calcification of cerebellum and basal ganglia.
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