Polycythemia
Polycythemia is defined by venous hemoglobin concentration > 220 g/l or by hematocrit value > 0.65 during the first week of life. It correlates clinically with hyperviscosity syndrome. The common causes: chronic intrauterine hypoxia twin-twin transfusion syndrome in monochorionic-diamniotic twins (recipient twin) excessive placental transfusion Diagnosis Clinical signs dictated by the severity of hyperviscosity syndrome (infant…