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ABeta amyloidosis, Italian type
Hereditary cerebral hemorrhage with amyloidosis (HCHWA), Italian type is a form of HCHWA (see this term) characterized by an age of onset of 50 years of age, dementia and lobar intracerebral hemorrhage.
ORPHA:324713Classification level: Subtype of disorder
- ABetaE22K amyloidosis
- HCHWA, Italian type
- Hereditary cerebral hemorrhage with amyloidosis, Italian type
- Prevalence: <1 / 1 000 000
- Inheritance: Autosomal dominant
- Age of onset: Adult, Elderly
- ICD-10: E85.4+ I68.0*
- OMIM: 605714
- UMLS: -
- MeSH: -
- GARD: -
- MedDRA: -
It has been described in three Italian families.
HCHWA, Italian type is due to a mutation in the APP gene on chromosome 21q21.2, encoding the beta-amyloid precursor protein. This mutation causes an increased accumulation of amyloid-beta protein in the walls of the arteries and capillaries of the meninges, cerebellar cortex and cerebral cortex, leading to the weakening and eventual rupture of these vessels.
Transmission is autosomal dominant.
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