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Erythroblastosis fetalis produced by anti-k
J M Bowman1, F A Harman, C R Manning
1Rh Laboratory Health Sciences Centre, Faculty of Medicine, University of Manitoba, Winnipeg, Canada.
Vox Sanguinis
|January 1, 1989
Summary
Severe fetal anemia due to anti-k alloimmunization required multiple intrauterine transfusions. This rare condition necessitates careful management of alloimmunized pregnancies.
Area of Science:
- Hematology
- Immunology
- Obstetrics
Background:
- Alloimmunization during pregnancy can lead to hemolytic disease in the fetus.
- The Kell (K) blood group system is a significant cause of alloimmunization.
- Severe cases may necessitate intrauterine interventions to prevent fetal demise.
Observation:
- A case of severe transfusion-induced anti-k alloimmunization is presented.
- The fetus required three intrauterine intravascular transfusions due to critically low hemoglobin (60 g/l) and hematocrit (0.19).
Findings:
- This is the first reported instance of anti-k alloimmunization causing erythroblastosis fetalis severe enough to warrant fetal transfusions.
- Anti-k alloimmunization is rare, occurring once in 3,246 alloimmunized pregnancies over 20 years and 8 months in Manitoba.
Implications:
- Anti-k alloimmunization can cause severe fetal disease, similar to RhD, Rhc, or K alloimmunization.
- Pregnant women with anti-k alloimmunization require vigilant monitoring and management protocols comparable to other high-risk alloimmunized pregnancies.