[Neonatal cortical hyperostosis. A side effect of prolonged prostaglandin E1 infusion].

Prostaglandin E1 (PGE1) infusion is usually administered for short periods to maintain patency of ductus arteriosus in infants with cyanotic heart disease. Prolonged therapy may be necessary while patients are awaiting surgical treatment. Several side effects occur at the onset of the treatment, most of them reversible once the treatment is discontinued.

[Congenital adrenal hyperplasia salt-wasting form in males during the neonatal period. Can we anticipate to metabolic emergency?].

Congenital adrenal hyperplasia is a group of disorders resulting from the deficiency of one of the five enzymes required for the synthesis of cortisol. The most frequent is the steroid 21-hydroxylase deficiency, accounting for more than 90% of the cases. The capacity of aldosterone synthesis is also decreased in 75% of the affected infants, resulting in salt-wasting type and life-threatening metabolic crisis.

[Neonatal hemochromatosis. A cause of liver failure in utero. Report of two cases and review of the literature].

Neonatal hemochromatosis is a rare clinical pathologic entity, defined by severe neonatal liver failure of intrauterine onset associated with intra-and extra- hepatic siderosis that spares reticuloendothelial system. It is the most frequently recognized cause of liver failure in neonates. The cause is unknown but it may develop secondary to abnormal fetoplacental iron handling or perinatal liver disease or be familial or as a consequence of gestational alloimmune disease.