Inborn disorders of amino acid metabolism as etiologic factors in progressive encephalopathy in the early neonatal period

: The authors report three cases of neonates with severe, progressive encephalopathy provoked by congenital disturbances of amino acid metabolism (hyperglycinemia, citrulinemia, and hyperamoniemia type: II). The occurrence of convulsions is particularly pointed out, because they are the most indicative signs of brain damage manifested in the first seven days of life.