Clinical pathology selected abstracts
July 2023—Hemolytic disease of the fetus and newborn is caused by maternal immunoglobulin G crossing the placenta and binding to fetal RBC antigens. In severe cases, it results in fetal or neonatal anemia, edema, hepatosplenomegaly, and death. In China, antibodies to the ABO blood group system are the most common cause of hemolytic disease of the fetus and newborn (HDFN) and account for 85.3 percent of cases. This is followed by antibodies to the Rh blood group system, which account for 14.6 percent of HDFN cases. Other blood group systems, including Duffy, Kidd, and MNS, may also cause HDFN.