[Persistent hyperglycemia and hyperinsulinemia in a newborn infant].

Management of neonatal hyperglycemia is complex, especially in immature newborns. Etiology is diverse, the most frequent cause being iatrogeny. Neonatal diabetes mellitus is a rare cause of hyperglycemia during the first days of life. Insulin treatment is sometimes required to control the condition. When insulin requirements exceed 2I U/kg/day insulin resistance syndrome should be suspected. We present the case of a newborn infant with Donohue syndrome, or leprechaunism, which is a rare, genetically determined dysmorphic syndrome leading to significant insulin resistance.