Abstract
AbstractBiotin–thiamine responsive basal ganglia disease is a neurometabolic disorder, seen in children presenting with encephalopathy, seizures, and positive family history. The disease is diagnosed based on typical magnetic resonance imaging (MRI) findings and whole exome sequencing but may be initially misdiagnosed as a mitochondrial encephalopathy or an inborn error of metabolism (IEM). We describe the case of an infant who presented with uncontrolled seizures and encephalopathy, responding to high doses of thiamine and biotin. Life-long supplementation of biotin (2–10 mg/kg/day) and thiamine (200–300 mg/day) improves the symptomatology and prevents relapse. Outcomes of the disease are heterogeneous, ranging in scope from complete remission to severe neurological sequelae.
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