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Living with Congenital dyserythropoietic anemia type 4

A newly described inherited blood condition with severe anemia from birth because red blood cells form poorly and break down early.

Understanding Congenital dyserythropoietic anemia type 4

Congenital dyserythropoietic anemia type IV (CDA IV) is a newly described form of CDA that leads to severe anemia at birth.

Red blood cell production is not effective, and cells break down early (hemolysis). Features include an enlarged liver and spleen, immature red blood cells in the blood, and in some cases thickened heart muscle, a prominent forehead or genital differences. It starts in newborns and infants.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Severe anemia from birth
  • Early breakdown of red blood cells (hemolytic anemia)
  • Enlarged liver and spleen
  • Immature red blood cells in the blood
  • Thickened heart muscle in some
  • Prominent forehead

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include blood and bone marrow specialists and genetic specialists.

  3. Consider genetic testing

    Changes in KLF1 are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

Care & treatment

Care team
Blood and bone marrow specialists (hematologists); Genetic specialists (geneticists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with rare disease patient organizations for support
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Should we have genetic testing for the KLF1 gene?
When might transfusions or other treatment be needed?
Does the heart need to be checked?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Dominant
GenesKLF1

Changes in the KLF1 gene are listed. It is autosomal dominant, so one changed copy of the gene is enough to cause it.

GeneticBlood

Also known as: anemia, congenital dyserythropoietic, type iva; cda due to klf1 mutation; cda iv; cda type 4; cda type iv; cda, type iva

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Congenital dyserythropoietic anemia type 4GARD ID 17344 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

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