Clinical and neuropsychological considerations in a case of unrecognized myoclonic epileptic jerks dramatically controlled by levetiracetam.

The International League Against Epilepsy (ILAE) classification recognizes 2 forms of myoclonic epilepsy with a good prognosis: benign myoclonic epilepsy of infancy (BMEI) and juvenile myoclonic epilepsy (JME); recent studies confirm the efficacy of levetiracetam (LEV) in treating idiopathic generalized epilepsies (IGE) in patients with myoclonic seizures. We report a girl referred to our Child Neuropsychiatry Unit at age 9 years because of massive myoclonic jerks, previously diagnosed as tics. Neuropsychological examination evidenced mild cognitive impairment. The clinical and electroencephalogram (EEG) data led to diagnosis of BMEI with late presentation. A dramatic suppression of interictal and ictal epileptiform activity was achieved after only one intake of LEV. Another neuropsychological examination after 6 months of treatment showed performance improvement probably related to EEG modifications. LEV may be suitable for the first-line treatment of myoclonic idiopathic seizures.