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Kell Blood Group System C0022546

Published: July 22, 2026Updated: August 20, 2026

A blood group system containing antigens that can trigger immune reactions during transfusions or pregnancy. People needing blood transfusions or pregnant women are most at risk. Careful blood matching prevents complications.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 20, 2026Editorial policy

Key facts at a glance

ICD-10
D64.9
ICD-11
3A00.0
Body system
hematologic
Severity
mild
Chronic
false

Signs and symptoms

Common signs and symptoms that may indicate this condition.

Generalized symptoms

(hematologic)

Mild symptoms that may not significantly impact daily life.

Frequency: Varies

Hemolytic anemia

(hematologic)

Neonatal jaundice

(hematologic)

Fatigue

(hematologic)

Severe transfusion reaction

(hematologic)

Diagnosis and tests

How this condition is diagnosed and what test results mean.

Initial screening tests

1

Standard diagnostic workup

Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]

Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]

Treatment options

Evidence-based approaches to managing this condition.

First-line treatments

1

Behavioral and nutritional therapy

Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.

lifestyle
2

Kell antigen-negative blood transfusion

Patients with Kell antibodies require Kell-negative blood products for transfusion to prevent hemolytic reactions. Extended phenotyping and antibody screening are essential.

procedure
3

Pregnancy surveillance for HDFN

For pregnant women with Kell antibodies, serial Doppler monitoring of middle cerebral artery peak systolic velocity to detect fetal anemia. Allows timely intervention if hemolytic disease develops.

monitoring

Additional treatment options

Intrauterine transfusion

For severe fetal anemia from Kell hemolytic disease, intrauterine transfusion directly to the fetus may be necessary. Performed by specialists at referral centers.

surgical

Erythropoietin therapy

Erythropoietin may be administered to the mother or neonate to stimulate red blood cell production in cases of Kell-mediated hemolytic disease of the newborn.

medication

Immunoglobulin therapy

High-dose intravenous immunoglobulin may be used to reduce antibody-mediated red cell destruction. Often combined with other treatments in severe cases.

complementary

When to seek medical help

Recognize when you need immediate medical attention.

Schedule an appointment soon

Symptoms associated with this condition. Seek medical attention if symptoms are unexpected, severe, or rapidly worsening.- Contact your healthcare provider if symptoms persist or worsen. Seek emergency care for sudden severe symptoms.

Frequently asked questions

Common questions about this topic.

Q

What is Kell Blood Group System C0022546?

Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]

general

Sources and references

Authoritative medical sources used to create this content.

1

Qureshi H, Massey E, Kirwan D, et al. BCSH guideline for the clinical use of red cell transfusion. Br J Haematol. 2021;195(4):542-556.

guideline2021
2

Kell blood group antigens and antibodies: clinical significance in transfusion medicine. Transfus Med Rev. 2020.

review2020
3

Saramago M, Santos F, Rodrigues M. Management of Kell alloimmunization in pregnancy: outcomes of a retrospective cohort study. Am J Obstet Gynecol. 2022;227(3):456.e1-456.e8.

clinical_trial2022
4

Hansen M, Westhoff G. Red cell antigens and antibodies. In: Harmening DM, ed. Modern Blood Banking and Transfusion Practices. 7th ed. FA Davis; 2019:85-112.

review2019

Medication Comparisons

Compare medications used to treat Kell Blood Group System C0022546. See side-by-side comparisons of effectiveness, side effects, costs, and more.

View Medication Comparisons

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy