Anti-Lewis alloimmunization: report of seven cases

Area of Science:

• Immunology
• Obstetrics
• Perinatology

Background:

• Maternal alloimmunization can lead to hemolytic disease of the fetus and newborn.
• Lewis antigens are important in transfusion medicine and pregnancy.

Purpose of the Study:

• To investigate perinatal outcomes in pregnancies with anti-Lewis antibodies.
• To evaluate the necessity of routine prenatal screening for Lewis antigens.

Main Methods:

• Retrospective chart review of 200 Rh-negative pregnant women with positive indirect Coombs tests.
• Analysis of perinatal data including transfusion needs, delivery mode, and neonatal outcomes.

Main Results:

• Seven pregnant women had anti-Lewis antibodies.
• All infants were appropriate for gestational age and did not require intrauterine or neonatal transfusions.
• Most infants were discharged in good health within three days.

Conclusions:

• Alloimmunized pregnancies involving Lewis antigens demonstrate positive perinatal results.
• The findings support the consideration of screening for Lewis antibodies in prenatal care.