raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:370930

XYLT1-CDG

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Infancy, Neonatal
Status
active

A rare congenital disorder of glycosylation characterized by moderate intellectual disability, short stature, mild skeletal changes and distinctive facial features with coarse face, synophyrs and deep nasolabial ridges. Skeletal features include broad ribs, stocky long bones, short femoral necks with coxa valga, clinodactyly and broad thumbs.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enXYLT1-CDG
frXYLT1-CDG
deXYLT1-CDG
esXYLT1-CDG
itXYLT1-CDG
nlXYLT1-CDG
ptXYLT1-CDG
plXYLT1-CDG
csXYLT1-CDG
ukXYLT1-CDG
zhXYLT1基因型先天性糖基化障碍
trXYLT1-CDG

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10E77.8NTBTattributedvalidated
ICD-115C54.1NTBTattributedvalidated
MONDO0018273Evalidated
UMLSC4750849Evalidated

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 (5):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
XYLT1Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:15516ENSG0000010348960812416p12.3xylosyltransferase 123982343[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families2 casesWorldwideCase(s)Validated23982343[PMID]
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

29 annotations · validated 2019-09-20
HPOTerm (as annotated by Orphanet)Diagnostic
Frequent (79-30%)
HP:0005616Accelerated skeletal maturation
HP:0001061Acne
HP:0000885Broad ribs
HP:0011304Broad thumb
HP:0030084Clinodactyly
HP:0002673Coxa valga
HP:0003015Flared metaphysis
HP:0001510Growth delay
HP:0002240Hepatomegaly
HP:0002342Intellectual disability, moderate
HP:0001373Joint dislocation
HP:0001382Joint hypermobility
HP:0000343Long philtrum
HP:0000252Microcephaly
HP:0500011Moon facies
HP:0001763Pes planus
HP:0000894Short clavicles
HP:0100864Short femoral neck
HP:0003026Short long bone
HP:0004322Short stature
HP:0001027Soft, doughy skin
HP:0000664Synophrys
HP:0012471Thick vermilion border
Occasional (29-5%)
HP:0000175Cleft palate
HP:0001007Hirsutism
HP:0000545Myopia
HP:0000520Proptosis
HP:0004482Relative macrocephaly
HP:0001956Truncal obesity

Annotation source: 28484880[PMID]_23982343[PMID]

7

Sources for this card