Annals of Indian Academy of Neurology
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Year : 2019  |  Volume : 22  |  Issue : 4  |  Page : 496-499

Adult-onset isolated hemichorea revealing iatrogenic hypoparathyroidism and bilateral basal ganglia calcification

1 Department of Neurology, Seth GS Medical College and KEM Hospital, Mumbai, Maharashtra, India
2 Department of Neurology, Seth GS Medical College and KEM Hospital; Department of Neurology, Global Hospitals, Mumbai, Maharashtra, India

Correspondence Address:
Dr. Pankaj A Agarwal
Room 213, Movement Disorders Clinic, Global Hospitals, Dr. Ernest Borges Road, Parel, Mumbai - 400 012, Maharashtra
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/aian.AIAN_123_18

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Isolated hemichorea (HC) in adults has a relatively restricted differential diagnosis including stroke of contralateral basal ganglia nuclei, nonketotic hyperglycemia, and basal ganglia toxoplasmosis in HIV infection. Hypoparathyroidism-related basal ganglia calcification can potentially cause neurological problems, including movement disorders, that are usually bilateral in keeping with bilateral symmetric lesions. We report a patient with video-documented isolated, adult-onset HC due to iatrogenic hypoparathyroidism and bilateral basal ganglia calcification. A 47-year-old woman presented with isolated adult-onset HC of 2 years' duration as the presenting and only neurological feature of hypoparathyroidism and bilateral extensive basal ganglia calcification, 20 years after thyroidectomy-induced hypoparathyroidism. Significant improvement in the unilateral hyperkinesia was noted after correction of hypocalcemia and hypoparathyroidism at 3 months. Isolated HC in adults is a rare presenting feature of hypoparathyroidism with bilateral basal ganglia calcification and is treatable with correction of the underlying metabolic abnormality. In all cases with a movement disorder and brain calcification, hypoparathyroidism should be actively sought as this treatable condition must not be missed.

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