raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:95428

COG8-CDG

Synonyms: CDG syndrome type IIh · CDG-IIh · CDG2H · Carbohydrate deficient glycoprotein syndrome type IIh · Congenital disorder of glycosylation type 2h · Congenital disorder of glycosylation type IIh

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Childhood
Status
active

The CDG (Congenital Disorders of Glycosylation) syndromes are a group of autosomal recessive disorders affecting glycoprotein synthesis. CDG syndrome type IIh is characterised by severe psychomotor retardation, failure to thrive and intolerance to wheat and dairy products.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enCOG8-CDGCDG syndrome type IIh · CDG-IIh · CDG2H · Carbohydrate deficient glycoprotein syndrome type IIh · Congenital disorder of glycosylation type 2h · Congenital disorder of glycosylation type IIh
frCOG8-CDGAnomalie congénitale de la glycosylation type 2h · Anomalie congénitale de la glycosylation type IIh · CDG-IIh · CDG2H · Syndrome CDG type IIh · Syndrome des glycoprotéines déficientes en hydrates de carbone type IIh
deCOG8-CDGCDG-IIh · CDG-Syndrom Typ IIh · CDG2H · Kohlenhydrat-defizientes Glykoprotein-Syndrom IIh · Kongenitaler Defekt der Glycoproteinbiosynthese Typ IIh
esCOG8-CDGCDG-IIh · CDG2H · Síndrome CDG tipo IIh · Síndrome de glicoproteínas deficientes en carbohidratos tipo IIh · Trastorno congénito de la glicosilación tipo 2h · Trastorno congénito de la glicosilación tipo IIh
itCOG8-CDGCDG-IIh · CDG2H · Disturbo congenito della glicosilazione, tipo 2h · Disturbo congenito della glicosilazione, tipo IIh · Sindrome CDG, tipo IIh · Sindrome delle glicoproteine carenti in carboidrati, tipo IIh
nlCOG8-CDGCDG-IIh · CDG-syndroom type IIh · CDG2H · Congenitale defecten van de glycosylering type 2h · Congenitale defecten van de glycosylering type IIh · Congenitale glycosylatiestoornis type 2h · Congenitale glycosylatiestoornis type IIh · Koolhydraatdeficiënt glycoproteïne syndroom type IIh
ptSíndrome dos CDG tipo IIh
plCOG8-CDGCDG2H · CDG-IIh · Wrodzone zaburzenia glikozylacji typu 2h · Wrodzone zaburzenia glikozylacji typu IIh · Zespół CDG typu IIh · Zespół obniżonej glikozylacji glikoprotein typu IIh
csCDG syndrom, typ IIhCOG8-CDG · CDG-IIh · CDG2H
ukCOG8-CDGВуглеводно-дефіцитний глікопротеїновий синдром типу IIh · Синдром CDG, тип IIh · CDG2H · CDG-IIh · Вроджене порушення глікозилювання типу 2h · Вроджене порушення глікозилювання типу IIh
zh2h型先天性糖基化障碍碳水化合物缺乏糖蛋白综合征IIh型
trCOG8-CDGCDG2H · CDG-IIh · CDG sendromu tip IIh · Doğumsal glikozilasyon bozukluğu tip 2h · Doğumsal glikozilasyon bozukluğu tip IIh · Karbonhidrat eksikliği olan glikoprotein sendromu tip IIh

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM611182Evalidated
ICD-10E77.8NTBTattributedvalidated
ICD-115C54.2NTBTindexvalidated
MONDO0012635Evalidated
MeSHC566987Evalidated
UMLSC1970021Evalidated
GARD12411Evalidated

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 (3):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
COG8Disease-causing germline mutation(s) inAssessedHGNC:18623ENSG0000021338060697916q22.1component of oligomeric golgi complex 817331980[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families2 casesWorldwideCase(s)Validated17331980[PMID]_17220172[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_17331980[PMID]_17220172[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

24 annotations · validated 2019-09-16
HPOTerm (as annotated by Orphanet)Diagnostic
Frequent (79-30%)
HP:0001251Ataxia
HP:0007267Chronic axonal neuropathy
HP:0002376Developmental regression
HP:0001508Failure to thrive
HP:0008947Floppy infant
HP:0012537Food intolerance
HP:0001249Intellectual disability
HP:0002421Poor head control
HP:0002465Poor speech
HP:0002243Protein-losing enteropathy
HP:0001250Seizure
HP:0011344Severe global developmental delay
HP:0003202Skeletal muscle atrophy
Occasional (29-5%)
HP:0006846Acute encephalopathy
HP:0001137Alternating esotropia
HP:0007366Atrophy/Degeneration affecting the brainstem
HP:0001272Cerebellar atrophy
HP:0002910Elevated circulating hepatic transaminase concentration
HP:0001943Hypoglycemia
HP:0001336Myoclonus
HP:0000253Progressive microcephaly
HP:0008151Prolonged prothrombin time
HP:0007420Spontaneous hematomas
HP:0002119Ventriculomegaly

Annotation source: 17220172[PMID]_17331980[PMID]_20301507[PMID]

7

Sources for this card