A 78-year-old woman presented with a short history of confusion and seizures and was found to be hyponatraemic. Routine investigations failed to find a cause. Magnetic resonance imaging showed encephalitic changes in the temporal lobes, and voltage-gated potassium-channel antibodies were found in her blood in high titre. Although rare, this condition is important because it may respond to immunosuppression.
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Dunstan et al. (2006) studied this question.
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