Of three hundred and sixty-one cases seen in a liaison psychiatry service over a twelve-month period, fifteen cases presented with psychiatric symptoms related to epileptic activity, or the treatment thereof. Seven new cases of epilepsy were diagnosed on the basis of primarily psychiatric phenomenology. The fact that twenty-five per cent of patients with epilepsy seen during this period had been incorrectly diagnosed gives cause for concern, and examination of the factors which caused diagnostic difficulty in these cases reveals details of interest to practising clinicians.