raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:3379

Distal duplication 17q syndrome

Synonyms: Distal trisomy 17q · Telomeric duplication 17q · Trisomy 17qter

Type
Malformation syndrome
Group
Disorder
Age of onset
Neonatal
Status
active

Distal trisomy 17q is a rare chromosomal anomaly syndrome with variable phenotype principally characterized by intellectual disability, developmental delay, short stature, craniofacial dysmorphism (incl. microcephaly, low posterior hairline, frontal bossing, bitemporal narrowing, low-set and malformed ears, flat nasal bridge, long philtrum, wide mouth with downturned corners, thin upper lip) and a short, webbed neck, as well as skeletal anomalies (e.g. brachyrhizomelia, poly-/syndactyly) and joint hyperlaxity. Cardiac, cerebral, and urogenital anomalies are also frequently associated.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enDistal duplication 17q syndromeDistal trisomy 17q · Telomeric duplication 17q · Trisomy 17qter
frSyndrome de duplication distale 17qDuplication 17qter · Duplication télomérique 17q · Trisomie 17qter · Trisomie distale 17q · Trisomie télomérique 17q
deDistale Duplikation 17qDistale Trisomie 17q · Telomere Duplikation 17q · Trisomie 17qter
esSíndrome de duplicación terminal 17qTrisomía 17qter · Trisomía terminal 17q
itSindrome duplicazione 17q distaleDuplicazione 17q telomerica · Trisomia 17qter · Trisomia 17q distale
nlDistale duplicatie 17q-syndroomDistale trisomie 17q · Telomerische duplicatie 17q · Trisomie 17qter
ptDuplicação distal 17qDuplicação telomérica 17q · Trissomia 17qter · Trissomia distal 17q
plZespół duplikacji dystalnej 17qDystalna duplikacja 17q · Telomerowa duplikacja 17q · Trisomia 17qter
csDistální trizomie 17qDistální duplikace 17q · Telomerická duplikace 17q · Trizomie 17qter
ukДистальна дуплікація 17qДистальна трисомія 17q · Теломерна дуплікація 17q · Трисомія 17qter
zh17号染色体长臂远端三体17号染色体长臂远端重复
trDistal trizomi 17qTrizomi 17qter · Distal duplikasyon 17q · Telomerik çoğaltma 17q

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10Q92.3NTBTattributedvalidated
MONDO0018069Evalidated
MeSHC536579Evalidated
UMLSC4707663Evalidated

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

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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

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families30 casesWorldwideCase(s)Validated39619310[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidated39619310[PMID]_ORPHANET

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

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HPO phenotypes

42 annotations · validated 2016-10-26
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001263Global developmental delay
HP:0010864Intellectual disability, severe
Frequent (79-30%)
HP:0009911Abnormal temporal bone morphology
HP:0000581Blepharophimosis
HP:0000175Cleft palate
HP:0000028Cryptorchidism
HP:0005280Depressed nasal bridge
HP:0000286Epicanthus
HP:0002572Episodic vomiting
HP:0002007Frontal bossing
HP:0002857Genu valgum
HP:0001822Hallux valgus
HP:0001161Hand polydactyly
HP:0000218High palate
HP:0000316Hypertelorism
HP:0002162Low posterior hairline
HP:0000252Microcephaly
HP:0000347Micrognathia
HP:0000768Pectus carinatum
HP:0001761Pes cavus
HP:0000358Posteriorly rotated ears
HP:0008905Rhizomelia
HP:0003510Severe short stature
HP:0002000Short columella
HP:0000322Short philtrum
HP:0004322Short stature
HP:0000219Thin upper lip vermilion
HP:0000076Vesicoureteral reflux
HP:0000154Wide mouth
Occasional (29-5%)
HP:0006897Abducens palsy
HP:0001627Abnormal heart morphology
HP:0001747Accessory spleen
HP:0001166Arachnodactyly
HP:0008619Bilateral sensorineural hearing impairment
HP:0001321Cerebellar hypoplasia
HP:0000752Hyperactivity
HP:0001382Joint hypermobility
HP:0001845Overlapping toe
HP:0000411Protruding ear
HP:0000075Renal duplication
HP:0002650Scoliosis
HP:0001250Seizure

Run the differential on the 2 obligate / very frequent terms

Annotation source: 477015[PMID]_12244560[PMID]_8267933[PMID]_3359688[PMID]_3265610[PMID]_3874592[PMID]_18444226[PMID]_20420026[PMID]_20420026[PMID]_26166353[PMID]_477015[PMID]

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Sources for this card