•Polychromasia (polychromatophilic cells) in a neonate.  Polychromatophilic cells are young red blood cells that have been recently released from the bone marrow.  They are larger than mature red cells, and are bluish in color.  Polychromasia is increased in hemolysis, blood loss, and marrow infiltration.  Normal neonates have a higher number of polychromatophilic cells than older children and adults.