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Hyperglycaemia and chorea regarding the paper by degnan et al, 1 i would like to draw attention to the fact that hyperglycaemia was omitted from the list of metabolic/endocrine causes of chorea. one example was that of a 72-year-old man with non-ketotic hyperglycaemia characterised by blood glucose 57.7 mmol/l, corrected serum sodium 141 mmol/l, and normal calcium and magnesium levels. 2 after fl uid replacement therapy and correction of hyperglycaemia there was no recurrence of hemichorea-hemiballismus.