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Living with Fanconi anemia complementation group D1

A rare type of Fanconi anemia caused by changes in both copies of the BRCA2 gene, with childhood cancers and other body differences.

Understanding Fanconi anemia complementation group D1

Fanconi anemia complementation group D1 is a rare type of Fanconi anemia linked to changes in both copies of the BRCA2 gene.

It can cause bone marrow failure over time and differences in the heart, brain, intestines, or bones. Bone marrow problems and birth differences are less common than in other types of Fanconi anemia. The risk of childhood cancers is high, including Wilms tumor, brain tumors, and leukemia.

Signs & symptoms

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

  • Small head size (microcephaly)
  • Café-au-lait spots
  • Slow weight gain (failure to thrive)
  • Slow growth before birth
  • Leukemia (acute myeloid leukemia)
  • Bone marrow failure

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 cancer specialists, genetic specialists and kidney specialists.

  3. Consider genetic testing

    Changes in BRCA2 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

    Fanconi Cancer Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Cancer specialists (oncologists); Genetic specialists (geneticists); Kidney specialists (nephrologists)
Expert care
Expert lists: Fanconi Cancer 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 Fanconi Cancer Foundation and other patient organizations
  • 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
What cancer screening does my child need, and how often?
How often should blood counts be checked?
What does genetic testing mean for family members?

Quick facts

InheritanceAutosomal Recessive
GenesBRCA2

Changes in both copies of the BRCA2 gene cause it. It is autosomal recessive, which means a child inherits a changed copy from each parent.

GeneticKidney

Also known as: brca2-related fanconi anemia; fad1; fancd1; inherited cancer-predisposing syndrome due to biallelic brca2 mutations

Patient organizations

Source: NIH GARD · Fanconi anemia complementation group D1GARD ID 17449 · 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 Fanconi anemia complementation group D1.

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