A case of a young man with dissociativedisorder and features of histrionic personality ispresented. The immediate reason for his hospitalization were episodes of lass of consciousness withtremor of the body, recurring during the past two years. These episodes had been diagnosed as epileptic fits, despite the lack of confirmed c.n.s. abnormalities.Difficulties in the differential diagnosis in such cases, as well as the need for experience and co-operationbetween medical professionals representing variousspecialties are emphasised. Psychotherapy is regardedhere as a crucial method of treatment, supported bylaw doses of antidepressants or neuroleptics.