raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:263501

COG4-CDG

Synonyms: CDG syndrome type IIj · CDG-IIj · CDG2J · Carbohydrate deficient glycoprotein syndrome type IIj · Congenital disorder of glycosylation type 2j · Congenital disorder of glycosylation type IIj

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

COG4-CDG is an extremely rare form of CDG syndrome characterized clinically in the single reported case to date by seizures, some dysmorphic features, axial hypotonia, slight peripheral hypertonia and hyperreflexia.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enCOG4-CDGCDG syndrome type IIj · CDG-IIj · CDG2J · Carbohydrate deficient glycoprotein syndrome type IIj · Congenital disorder of glycosylation type 2j · Congenital disorder of glycosylation type IIj
frCOG4-CDGAnomalie congénitale de la glycosylation type 2j · Anomalie congénitale de la glycosylation type IIj · CDG-IIj · CDG2J · Syndrome CDG type IIj · Syndrome des glycoprotéines déficientes en hydrates de carbone type IIj
deCOG4-CDGCDG (Congenital Disorder of Glycosylation) Typ Iij · CDG-IIj · CDG-Syndrom Typ IIj · CDG2J · Kohlenhydrat-defizientes Glykoprotein-Syndrom Iij · Kongenitaler Defekt der Glycoproteinbiosynthese Typ IIj
esCOG4-CDGCDG-IIj · CDG2J · Síndrome CDG tipo IIj · Síndrome de glicoproteínas deficientes en carbohidratos tipo IIj · Trastorno congénito de la glicosilación tipo 2j · Trastorno congénito de la glicosilación tipo IIj
itCOG4-CDGCDG-IIj · CDG2J · Disturbo congenito della glicosilazione, tipo IIj · Sindrome CDG, tipo IIj · Sindrome delle glicoproteine carenti in carboidrati, tipo IIj
nlCOG4-CDGCongenitale glycosylatiestoornis type IIj · Koolhydraatdeficiënt glycoproteïne syndroom type IIj · CDG-IIj · CDG-syndroom type IIj · CDG2J · Congenitale defecten van de glycosylering type 2j · Congenitale defecten van de glycosylering type IIj · Congenitale glycosylatiestoornis type 2j
ptSíndromeCDG, tipo IIj
plCOG4-CDGCDG2J · CDG-IIj · Zespół CDG typu IIj · Wrodzone zaburzenie glikozylacji typu 2j · Wrodzone zaburzenie glikozylacji typu IIj · Zespół obniżonej glikozylacji glikoprotein typu IIj
csCOG4-CDGCDG syndrom, typ IIj · CDG IIj · CDG2J · Vrozená porucha glykosylace, typ IIj
ukCOG4-CDGВуглеводно-дефіцитний глікопротеїновий синдром типу IIj · Синдром CDG, тип IIj · CDG2J · CDG-IIj · Вроджене порушення глікозилювання типу 2j · Вроджене порушення глікозилювання типу IIj
zhCOG4基因型先天性糖基化障碍糖基化缺陷糖蛋白综合征IIj型
trCOG4-CDGCDG2J · CDG-IIj · CDG sendromu tip IIj · Doğumsal glikozilasyon bozukluğu tip 2j · Doğumsal glikozilasyon bozukluğu tip IIj · Karbonhidrat eksikliği olan glikoprotein sendromu tip Iıj

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM613489Evalidated
ICD-10E77.8NTBTattributedvalidated
ICD-115C54.2NTBTindexvalidated
MONDO0013281Evalidated
UMLSC4303552Evalidated
GARD12412Evalidated

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):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
COG4Disease-causing germline mutation(s) inAssessedHGNC:18620ENSG0000010305160697616q22.1component of oligomeric golgi complex 420301507[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families2 casesWorldwideCase(s)Validated22516080[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

33 annotations · validated 2017-11-22
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0012347Abnormal protein N-linked glycosylation
HP:0012358Abnormal protein O-linked glycosylation
Frequent (79-30%)
HP:0003256Abnormality of the coagulation cascade
HP:0001344Absent speech
HP:0001251Ataxia
HP:0008936Axial hypotonia
HP:0001394Cirrhosis
HP:0011172Complex febrile seizure
HP:0003155Elevated circulating alkaline phosphatase concentration
HP:0002910Elevated circulating hepatic transaminase concentration
HP:0001531Failure to thrive in infancy
HP:0011968Feeding difficulties
HP:0006892Frontotemporal cerebral atrophy
HP:0008935Generalized neonatal hypotonia
HP:0001263Global developmental delay
HP:0001510Growth delay
HP:0001433Hepatosplenomegaly
HP:0003124Hypercholesterolemia
HP:0001347Hyperreflexia
HP:0002254Intermittent diarrhea
HP:0000737Irritability
HP:0002509Limb hypertonia
HP:0000252Microcephaly
HP:0000639Nystagmus
HP:0002788Recurrent upper respiratory tract infections
HP:0000340Sloping forehead
HP:0100874Thick hair
HP:0001873Thrombocytopenia
HP:0012301Type II transferrin isoform profile
Occasional (29-5%)
HP:0006583Fatal liver failure in infancy
HP:0002079Hypoplasia of the corpus callosum
HP:0040187Neonatal sepsis
HP:0004798Recurrent infection of the gastrointestinal tract

Run the differential on the 2 obligate / very frequent terms

Annotation source: 19494034[PMID]_21185756[PMID]_16356446[PMID]

7

Sources for this card