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Living with DOCK2 deficiency

A rare inherited immune condition that starts in infancy with repeated, serious viral and bacterial infections.

Understanding DOCK2 deficiency

DOCK2 deficiency is a rare inherited immune condition in which T cells and B cells don't work well.

Babies and young children with this condition have repeated, serious viral and bacterial infections. Tests show low T and B cell counts, poor antibody response, and low platelets. Infections can include pneumonia, bronchiolitis, ear infections, brain and spinal cord infections, colitis, and diarrhea. Signs show up in the newborn and infant years.

Signs & symptoms

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

  • Low T cell count
  • Repeated pneumonia
  • Repeated viral and bacterial infections
  • Low platelet count (thrombocytopenia)
  • Chronic diarrhea (less common)
  • Chronic oral thrush (less common)

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 allergy and immune system specialists and genetic specialists.

  3. Consider genetic testing

    Changes in DOCK2 are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

  4. Connect with expert centers

    Immune Deficiency Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Allergy and immune system specialists (allergists / immunologists); Genetic specialists (geneticists)
Expert care
Expert lists: Immune Deficiency Foundation
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 Immune Deficiency Foundation
  • 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
Would genetic testing for the DOCK2 gene help our family?
What treatments or precautions can help prevent infections?
Should we see an immune specialist (immunologist)?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Recessive
GenesDOCK2

GARD says changes in the DOCK2 gene cause this condition. It is autosomal recessive, meaning a child inherits a changed copy of the gene from each parent.

Genetic

Also known as: dedicator of cytokinesis 2 deficiency; immunodeficiency 40; immunodeficiency type 40

Patient organizations

Broader rare-disease groups

Source: NIH GARD · DOCK2 deficiencyGARD ID 12653 · 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

Perspectives from people navigating life with DOCK2 deficiency.

Explore the DOCK2 deficiency blog

Explore research for DOCK2 deficiency

Explore actively recruiting DOCK2 deficiency studies with HealthSpark.

HealthSpark

Find actively recruiting studies for DOCK2 deficiency with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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