INTRODUCTION: Cyanocobalamin (vitamin B12) is an essential cofactor of various metabolic pathways. Lack of it leads to symptoms which may be constitutional, of skin or mucous membranes, hematological or neuropsychiatric disorders. Neurological involvement in adults has been well described and analyzed in the literature, however there are fewer cases of children. In the cases described in children the deficiency was related to maternal malnutrition, and socioeconomic and cultural problems. Since vegetarianism is a custom
