raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:251076

8p23.1 duplication syndrome

Synonyms: Dup(8)(p23.1p23.1) · Trisomy 8p23.1

Type
Malformation syndrome
Group
Disorder
Inheritance
Not applicable, Unknown
Age of onset
Antenatal, Infancy, Neonatal
Status
active

8p23.1 duplication syndrome is a rare chromosomal anomaly syndrome, resulting from the partial duplication of the short arm of chromosome 8, with a highly variable phenotype, principally characterized by mild to moderate developmental delay, intellectual disability, mild facial dysmorphism (incl. prominent forehead, arched eyebrows, broad nasal bridge, upturned nares, cleft lip and/or palate) and congenital cardiac anomalies (e.g., atrioventricular septal defect). Other reported features include macrocephaly, behavioral abnormalities (e.g., attention deficit disorder), seizures, hypotonia and ocular and digital anomalies (poly/syndactyly).

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
en8p23.1 duplication syndromeDup(8)(p23.1p23.1) · Trisomy 8p23.1
frSyndrome de duplication 8p23.1Dup(8)(p23.1p23.1) · Trisomie 8p23.1
deMikroduplikationssyndrom 8p23.1Dup(8)(p23.1p23.1) · Trisomie 8p23.1
esSíndrome de duplicación 8p23.1Dup(8)(p23.1p23.1) · Trisomía 8p23.1
itSindrome da duplicazione 8p23.1Dup(8)(p23.1p23.1) · Trisomia 8p23.1
nl8p23.1-duplicatiesyndroomDup(8)(p23.1) · Trisomie 8p23.1
ptSíndrome de microduplicação 8p23.1Trissomia 8p23.1
plZespół mikroduplikacji 8p23.1Dup(8)(p23.1) · Trisomia 8p23.1
csSyndrom duplikace 8p23.1Dup(8)(p23.1p23.1) · Trizomie 8p23.1
ukСиндром дуплікації 8p23.1Dup(8)(p23.1p23.1) · Трисомія 8p23.1
zh染色体8p23.1重复综合征8p23.1重复
tr8p23.1 duplikasyon sendromuTrizomi 8p23.1 · Dup (8) (p23.1p23.1)

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10Q92.3NTBTattributedvalidated
ICD-11LD41.71NTBTindexvalidated
MONDO0016659Evalidated
UMLSC4707330Evalidated
GARD10304Evalidated

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 (1):

No children.

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalence1-9 / 100 0001.72 / 100 000WorldwideValue and classValidated23345203[PMID]

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

18 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Frequent (79-30%)
HP:0030680Abnormal cardiovascular system morphology
HP:0001263Global developmental delay
HP:0002553Highly arched eyebrow
HP:0001249Intellectual disability
HP:0002463Language impairment
Occasional (29-5%)
HP:0000846Adrenal insufficiency
HP:0000490Deeply set eye
HP:0100777Exostoses
HP:0000365Hearing impairment
HP:0000126Hydronephrosis
HP:0000316Hypertelorism
HP:0000343Long philtrum
HP:0001642Pulmonic stenosis
HP:0001636Tetralogy of Fallot
HP:0012471Thick vermilion border
HP:0001770Toe syndactyly
HP:0001629Ventricular septal defect
HP:0000445Wide nose
7

Sources for this card