Fanconi anemia
Fanconi anemia is a rare disorder characterized by progressive bone marrow failure, various congenital abnormalities, and predisposition to malignancies (often acute myeloid leukemia). Bone marrow failure usually results in decreased production of all blood cells. It is considered the commonest type of inherited marrow failure syndrome . It is almost invariably inherited in an autosomal recessive pattern.
Terminology
Fanconi anemia should not be confused with Fanconi syndrome which is a renal disease.
Epidemiology
The estimated incidence is ~1:35,000 births. There may be a higher frequency in Ashkenazi Jews and Afrikaners in South Africa. There might also be a slight male predilection.
Associations
- horseshoe kidney
- endocrine abnormalities
- hypothyroidism
- short stature
- growth hormone deficiency
- hepatic tumors
- squamous cell carcinomas
- esophagus
- vulva
- oropharynx
Pathology
Genetics
It is mostly transmitted by autosomal recessive inheritance (>99%).
Classification
At least 13 genetic subtypes are described:
- type a
- type b
- type c
- type d1
- type d2
- type e
- type f
- type g
- type i
- type j
- type l
- type m
- type n
Radiographic features
Although non-specific, commonly described features include:
- radial ray anomalies: including absent thumb
- triphalangeal thumb
- congenital hip dysplasia
- scoliosis
- vertebral anomalies
Treatment and prognosis
The main cause of mortality is from marrow failure. Treatments include transfusion of blood products and bone marrow transplants. As most cases are inherited, genetic counseling is important.
History and etymology
First described by a Swiss pediatrician, Guido Fanconi (1892-1979), in 1927 .
Siehe auch:
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Assoziationen und Differentialdiagnosen zu Fanconi-Anämie:
