GM2 Gangliosidosis II

GM2 gangliosidosis II(Sandhoff disease) is a lysosomal storage disease due to deficiency of beta-hexosaminidase activity, transmitted by mode of autosomal recessive. Clinical features are so variable, ranging from infantile onset resulting death before 4 years, to subacute or chronic forms with more slowly progressive neurologic condition. We experienced a case of GM2 gangliosidosis II in a 14 months old male who had developmental deterioration and seizures, so we report and review the related literatures.