raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:85458

Hereditary cerebral amyloid angiopathy

Synonyms: HCHWA · Hereditary cerebral hemorrhage with amyloidosis

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Adult
Status
active

A rare genetic cerebral small vessel disease characterized by amyloid deposition in the cerebral blood vessels leading to predominantly hemorrhagic strokes, focal neurological deficits, and progressive cognitive decline eventually leading to dementia.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enHereditary cerebral amyloid angiopathyHCHWA · Hereditary cerebral hemorrhage with amyloidosis
frAngiopathie amyloïde cérébrale héréditaireHCHWA · Hémorragie cérébrale héréditaire avec amylose
deZerebrale Amyloidangiopathie, hereditäreHCHWA · Hereditäre zerebrale Hämorrhagie mit Amyloidose
esAngiopatía amiloide cerebral hereditariaHCHWA · Hemorragia cerebral hereditaria con amiloidosis
itAngiopatia amiloide cerebrale ereditariaEmorragia cerebrale ereditaria con amiloidosi · HCHWA
nlHereditaire cerebrale amyloïdangiopathieHCHWA · Hereditaire cerebrale hemorragie met amyloïdose
ptAngiopatia amiloide cerebralHemorragia cerebral hereditária com amiloidose
plDziedziczny krwotok mózgowy z amyloidoząHCHWA
csHereditární mozkové krvácení s amyloidózouHCHWA
ukЦеребральна амілоїдна ангіопатіяHCHWA · Спадковий крововилив у мозок з амілоїдозом
zh遗传性脑出血伴淀粉样变HCHWA
trAmiloidoz ile seyreden kalıtsal beyin kanamasıHCHWA

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM105150BTNTvalidated
OMIM605714BTNTvalidated
ICD-10E85.4+NTBTattributedvalidated
ICD-10I68.0*NTBTattributedvalidated
ICD-118B22.3NTBTattributedvalidated
MONDO5620Evalidated
UMLSC1510489Evalidated
GARD10266Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (4):

Children (7):

4

Genes

0 direct · 7 via subtypes

Orphanet records no gene directly on this code.

Recorded by Orphanet on subtypes of this disorder:

GeneSubtypeAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
APPORPHA:100006ABeta amyloidosis, Dutch typeDisease-causing germline mutation(s) inAssessedHGNC:620ENSG0000014219210476021q21.3amyloid beta precursor protein24870607[PMID]
APPORPHA:324703ABetaL34V amyloidosisDisease-causing germline mutation(s) inAssessedHGNC:620ENSG0000014219210476021q21.3amyloid beta precursor protein16178030[PMID]
APPORPHA:324708ABeta amyloidosis, Iowa typeDisease-causing germline mutation(s) inAssessedHGNC:620ENSG0000014219210476021q21.3amyloid beta precursor protein12557012[PMID]
APPORPHA:324713ABeta amyloidosis, Italian typeDisease-causing germline mutation(s) inAssessedHGNC:620ENSG0000014219210476021q21.3amyloid beta precursor protein20697050[PMID]
APPORPHA:324718ABetaA21G amyloidosisDisease-causing germline mutation(s) inAssessedHGNC:620ENSG0000014219210476021q21.3amyloid beta precursor protein1303239[PMID]
APPORPHA:324723ABeta amyloidosis, Arctic typeDisease-causing germline mutation(s) inAssessedHGNC:620ENSG0000014219210476021q21.3amyloid beta precursor protein18413473[PMID]
CST3ORPHA:100008ACys amyloidosisDisease-causing germline mutation(s) inAssessedHGNC:2475ENSG0000010143960431220p11.21cystatin C2541223[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families350 casesWorldwideCase(s)Validated[EXPERT]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

13 annotations · validated 2024-04-12
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0011970Cerebral amyloid angiopathy
Frequent (79-30%)
HP:0002120Cerebral cortical atrophy
HP:0001342Cerebral hemorrhage
HP:0012520Dilation of Virchow-Robin spaces
HP:0002315Headache
HP:0002344Progressive neurologic deterioration
HP:0001250Seizure
HP:0002138Subarachnoid hemorrhage
Occasional (29-5%)
HP:0012229CSF pleocytosis
HP:0025714Cerebral cortical microinfarct
HP:0000726Dementia
HP:0030890Hyperintensity of cerebral white matter on MRI
HP:0002922Increased CSF protein concentration

Run the differential on the 1 obligate / very frequent terms

Annotation source: 37492402[PMID]_36565446[PMID]_38344467[PMID]_29120920[PMID]

7

Sources for this card