Successful treatment of neonatal hemochromatosis as gestational alloimmune liver disease with intravenous immunoglobulin.

Neonatal hemochromatosis (NH) is a rare, often fatal disorder characterized by liver failure and hepatic and extrahepatic iron overload. Clinical manifestations can occur in utero or immediately after birth. Evidence suggests that most cases are due to a gestational disease with transplacental transfer of maternal IgG antibodies targeting the fetal liver resulting in immune injury. The alloimmune target is believed to be a fetal hepatocyte cell surface antigen, with subsequent complement activation resulting in severe loss of hepatocytes and fetal iron overload. This cascade of events leads to acute liver failure and neonatal death. With gestational alloimmune liver disease (GALD) being the mechanism of liver injury in most cases of NH, a new paradigm of treatment with intravenous immunoglobulin (IVIG) and exchange transfusion has been successfully used. We describe an extremely ill newborn with NH successfully treated with three doses of IVIG.

Familial neuroblastoma: report of a kindred with later age at diagnosis.

PURPOSE: To describe the clinical and biologic features of neuroblastoma (NB) in two siblings and their maternal second cousin. PATIENTS AND METHODS: NB was diagnosed in the siblings at 2 1/2 (patient 2) and 5 (patient 3) years of age. NB was diagnosed in their maternal second cousin (patient 1) when she was 7 years old. Standard clinical and biological data, tumor karyotype, and tumor allelotype at select loci were obtained. RESULTS: Patient 1 had International Neuroblastoma Staging System (INSS) stage 4 NB and unfavorable histology but no evidence of MYCN amplification; she died from complications of autologous bone marrow transplantation in second remission. Patient 2 had INSS stage 4 NB with unfavorable histology but no MYCN amplification; her disease recurred 39 months after completing therapy. Patient 3 had INSS stage 1 NB with favorable biologic features; he was treated with surgical excision and remains free of disease. CONCLUSIONS: Familial NB may occur at a later age than predicted by the tumor suppressor gene model of inherited cancer. This report further emphasizes the clinical and biological heterogeneity of familial NB.