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Living with Pancytopenia-developmental delay syndrome

A rare inherited condition in which the bone marrow slowly stops making blood cells, with learning difficulties and a small head.

Understanding Pancytopenia-developmental delay syndrome

Pancytopenia-developmental delay syndrome is a rare inherited form of aplastic anemia, where the bone marrow fails to make enough blood cells.

Over time, the bone marrow makes fewer red cells, white cells, and platelets. People also have developmental delay with learning disabilities, and a smaller head size (microcephaly). Mild facial differences and low muscle tone have been reported. GARD lists the onset as the teenage years.

Signs & symptoms

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

  • Bone marrow failure
  • Anemia (low red blood cells)
  • Low platelet count (thrombocytopenia)
  • Low white blood cell count
  • Small head (microcephaly)
  • Low muscle tone in newborns

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 ERCC6L2 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
How often should blood counts be checked?
Which specialists, such as blood doctors, should be on the team?
Should brothers and sisters have ERCC6L2 testing?

Quick facts

Symptoms usually startTeenager
InheritanceAutosomal Recessive
GenesERCC6L2

Changes in the ERCC6L2 gene cause this condition. It is autosomal recessive, which means a child inherits a changed copy of the gene from each parent.

GeneticBlood

Also known as: bone marrow failure syndrome 2; bone marrow failure syndrome type 2; trilineage bone marrow failure-developmental delay syndrome

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Pancytopenia-developmental delay syndromeGARD ID 17655 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

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