About Fanconi Anemia
Fanconi anemia (FA) is a rare inherited bone marrow failure syndrome characterized by severe cellular hypersensitivity to DNA crosslinking agents and progressive pancytopenia. Caused by mutations in genes encoding proteins involved in DNA repair (particularly homologous recombination repair and DNA interstrand crosslink repair), FA comprises 22+ complementation groups (FA-A through FA-W) with distinct genetic and clinical features.
The hallmark diagnostic feature is chromosomal breakage induced by diepoxybutane (DEB) or mitomycin C (MMC) testing. Pathophysiology involves impaired DNA crosslink repair, resulting in genomic instability and accumulation of damage in proliferating hematopoietic cells.
Patients develop progressive bone marrow failure with pancytopenia typically by second decade of life. About 75% have physical abnormalities including short stature, skeletal defects (thumb hypoplasia, radial ray defects, syndactyly), microcephaly, cleft lip/palate, and cardiac, renal, or urogenital anomalies. Most critically, FA patients have exponentially increased cancer risk with approximately 75% developing solid tumors or hematologic malignancies (acute myeloid leukemia, myelodysplastic syndrome, squamous cell carcinomas) by age 50. Gender ratios approximately equal. Prognosis without transplantation guarded.
Common Symptoms of Fanconi Anemia
Recognizing the signs of Fanconi Anemia early can lead to faster diagnosis and better outcomes. Symptoms may vary in severity from person to person. If you or a loved one are experiencing any of the following, consider speaking with a specialist.
- Anemia, thrombocytopenia, neutropenia by age 10
- Progressive bone marrow failure
- Physical abnormalities (short stature, thumb/radial defects)
- Increased bleeding and infections
- Developmental delay in some forms
- Extreme leukemia and solid tumor risk
Who Fanconi Anemia Affects
Typically manifests in first two decades of life with median diagnosis age 7 years. Affects males and females equally. Autosomal recessive inheritance in most types (FA-A most common, ~70% of cases); X-linked inheritance in rare FA-B type.
More common in certain ethnic populations including Ashkenazi Jewish, Hispanic, and South Asian populations. Carrier frequency for FA-A mutations higher in these populations. No geographic clustering beyond ethnic variation. Consanguinity increases incidence.
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Trusted Fanconi Anemia Resources
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