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Start free with EleplanHemolytic disease of the newborn with Kell alloimmunization
ORPHA:275944Disease
Also called Anti-K HDN · Maternal anti-Kell alloimmunization
What it is
A rare hematologic disease characterized by the transfer of maternal alloantibodies against red blood cell antigens of the Kell family to a fetus positive for this antigen across the placental barrier, causing suppression of erythropoiesis with reticulocytopenia and anemia, as well as alloimmune hemolysis. Severe anemia may lead to hydrops fetalis. Significant hyperbilirubinemia is rare in this condition.
Key facts
- Prevalence
- >1 / 1000 (annual incidence, United Kingdom)
- Age of onset
- Infancy, Neonatal
- Classified as
- Disease
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
ICD-10 codes
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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