CHOREA

Syndenham's chorea ['St Vitus dance'; follows streptococcal infection (feature of rheumatic fever); usually adolescent; recurrence may be precipitated by pregnancy]

Huntington's chorea [autosomal dominant; usually presents >30 years; progressive dementia also present]

benign hereditary chorea

pregnancy (chorea gravidarum)

tumours

cerebrovascular accident

systemic lupus erythematosus, especially with anticardiolipin antibodies

polycythaemia

hypoparathyroidism

thyrotoxicosis

hypernatraemia

drugs / toxins:

alcohol

levodopa

neuroleptics, eg. phenothiazines

oral contraceptive pill

phenytoin

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