raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:723094

Galactose-1-phosphate uridylyltransferase deficiency

Synonyms: GALT deficiency · GALT deficiency galactosemia · Galactose-1-phosphate uridylyltransferase deficiency galactosemia · Galactosemia type 1 · Galactosemia type I · Type 1 galactosemia · Type I galactosemia

Type
Clinical group
Group
Group of disorders
Status
active

A group of galactosemias characterized by GALT deficiency and presenting with variable clinical features depending on the residual GALT activity present in affected individuals, going from classic galactosemia manifesting with life-threatening complications triggered by breastfeeding or the ingestion of lactose/galactose-containing formula in untreated infants and long term-complications despite diet (GALT activity <1%), to a less severe phenotype (GALT activity 1-10%) or completely asymptomatic patients (GALT activity 25-30%).

1

Names in Orphadata languages

9 of 12 languages
LangNameSynonyms
enGalactose-1-phosphate uridylyltransferase deficiencyGALT deficiency · GALT deficiency galactosemia · Galactose-1-phosphate uridylyltransferase deficiency galactosemia · Galactosemia type 1 · Galactosemia type I · Type 1 galactosemia · Type I galactosemia
frDéficit en galactose-1-phosphate uridylyltransféraseDéficit en GALT · Galactosémie de type 1 · Galactosémie de type I · Galactosémie par déficit en GALT · Galactosémie par déficit en galactose-1-phosphate uridylyltransferase
deGalaktose-1-Phosphat-Uridyltransferase-MangelGalaktosämie durch GALT-Mangel · Galaktosämie durch Galaktose-1-Phosphat-Uridyltransferase-Mangel · GALT-Defizienz · Galaktosämie Typ 1 · Galaktosämie Typ I
esDeficiencia de galactosa-1-fosfato uridililtransferasaGalactosemia por deficiencia de galactosa-1-fosfato uridililtransferasa · Galactosemia tipo 1 · Galactosemia tipo I · Deficiencia de GALT · Galactosemia por deficiencia de GALT
itDeficit di galattosio-1-fosfato uridiltransferasiDeficit di GALT · Galattosemia tipo 1 · Galattosemia tipo I · Galattosemia da deficit di GALT · Galattosemia da deficit di galattosio-1-fosfato uridiltransferasi
nlDeficiëntie van galactose-1-fosfaaturidylyltransferaseGalactosemie door GALT-deficiëntie · Type I galactosemie · Type 1 galactosemie · Galactosemie type I · Galactosemie type 1 · GALT-deficiëntie · Galactosemie door deficiëntie van galactose-1-fosfaaturidylyltransferase
ptGalactose-1-phosphate uridylyltransferase deficiency
plGalactose-1-phosphate uridylyltransferase deficiency= en
csGalactose-1-phosphate uridylyltransferase deficiency= en

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation

No cross-references in this release.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (2):

Children (3):

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

0 records

No prevalence record in this release.

6

HPO phenotypes

Orphanet has no HPO annotation for this code in this release.

7

Sources for this card