West Syndrome Secondary to Biotinidase Deficiency about a Case

Biotinidase deficiency is an abnormality of biotin metabolism which is manifested by neurological, cutaneous, ophthalmological and auditory signs. It has been described as a cause of West syndrome, but there are few observations that report an association between these latter two. We report the observation of an 18-month old infant born from a first-degree consanguineous marriage, followed since the age of 2 months and half for West syndrome associated with alopecia, also an eczema and deafness in whom the etiological investigation was in favor of a biotinidase deficiency. Thus treatment with biotin resulted in a marked clinical improvement.