Hyperbilirubinemia due to hemolytic disease of newborn

Hyperbilirubinemia due to hemolytic disease of the newborn is a pathologic neonatal hematologic condition characterized by critically elevated levels of unconjugated serum bilirubin resulting from accelerated erythrocyte destruction It typically arises when maternal IgG alloantibodies against fetal red blood cell antigens—most commonly Rh(D) or ABO blood group incompatibilities—cross the placenta and trigger immune-mediated hemolysis The resulting rapid breakdown of red blood cells overwhelms th...

Hyperbilirubinemia due to hemolytic disease of the newborn is a pathologic neonatal hematologic condition characterized by critically elevated levels of unconjugated serum bilirubin resulting from accelerated erythrocyte destruction

It typically arises when maternal IgG alloantibodies against fetal red blood cell antigens—most commonly Rh(D) or ABO blood group incompatibilities—cross the placenta and trigger immune-mediated hemolysis The resulting rapid breakdown of red blood cells overwhelms the newborn’s immature hepatic conjugation pathways, leading to early-onset jaundice, hemolytic anemia, and reticulocytosis

Without prompt clinical intervention, the excessive circulating unconjugated bilirubin can cross the blood-brain barrier, placing the neonate at substantial risk for acute bilirubin encephalopathy and permanent neurodevelopmental sequelae, including kernicterus