Evaluation by a Vineland II Scale of Long-term Development of Children With Pyridoxine Dependent Epilepsy

Pyridoxine dependent epilepsy related to antiquitine deficiency is a rare and severe genetic epilepsy that usually starts within the first month of life. The treatment is based on high dose of Vitamin B6 (Pyridoxine) which is usually highly effective to control the seizures. However, most patients show impaired neurodevelopment. Ten years ago, international recommendations have changed and a lysine restricted diet was added as an adjunct therapy with the hope to improve neurodevelopment. Very few studies have evaluated the cognitive development of these patients in a standardized way, and these studies evaluate very few patients. It seems therefore essential to study in a standardized way the neurocognitive development of these patients in order to evaluate the impact of the care. The VINELAND adaptative behaviour scale II has been chosen because it can evaluate a patient whatever the age or the intellectual abilities through a semi-structured questionnaire completed with the parents, and gives a wide view of the neurocognitive development and everyday life autonomy of the patients.