2448 Clinical, neurophysiological, and imaging characteristics of Oligoepilepsy

ObjectivesOligoepilepsy is a poorly defined syndrome characterised by infrequent seizures. Oligoepilepsy poses a management dilemma with regards to the role of anti-seizure medication (ASM) and driving advice. The clinical, EEG and imaging characteristics of oligoepilepsy have not been well described.MethodsPatients were identified from a prospective database of adults with first-ever seizure. Oligoepilepsy was defined as patients who were not treated with ASM, and had ≥2 unprovoked seizures, with ≤1 seizure per year over ≥3 years follow-up. The comparator group comprised the remaining epilepsy patients.ResultsOf 810 patients with ≥2 unprovoked seizures, 33 (4%) met the definition of oligoepilepsy (45% female, median age 36 years, range 17–90 with no difference in age or sex to the epilepsy group). Median time to second seizure was 1343 days, as opposed to 107 days in the comparator group (p